894463869121 has 9 divisors (see below), whose sum is σ = 950191501161. Its totient is φ = 841833215232.

The previous prime is 894463869119. The next prime is 894463869163. The reversal of 894463869121 is 121968364498.

It is a happy number.

The square root of 894463869121 is 945761.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 22332014721 + 872131854400 = 149439^2 + 933880^2 .

It is not a de Polignac number, because 894463869121 - 2¹ = 894463869119 is a prime.

It is a super-2 number, since 2×894463869121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 894463869121.

It is not an unprimeable number, because it can be changed into a prime (894463869521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16050121 + ... + 16105753.

Almost surely, 2^894463869121 is an apocalyptic number.

894463869121 is the 945761-st square number.

894463869121 is the 472881-st centered octagonal number.

It is an amenable number.

894463869121 is a deficient number, since it is larger than the sum of its proper divisors (55727632040).

894463869121 is an frugal number, since it uses more digits than its factorization.

894463869121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111300 (or 55650 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 61.

It can be divided in two parts, 894463 and 869121, that added together give a square (1763584 = 1328²).

The spelling of 894463869121 in words is "eight hundred ninety-four billion, four hundred sixty-three million, eight hundred sixty-nine thousand, one hundred twenty-one".