912661140889 has 3 divisors (see below), whose sum is σ = 912662096223. Its totient is φ = 912660185556.

The previous prime is 912661140883. The next prime is 912661140901. The reversal of 912661140889 is 988041166219.

The square root of 912661140889 is 955333.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988041166219 = 443 ⋅2230341233.

It can be written as a sum of positive squares in only one way, i.e., 17162310025 + 895498830864 = 131005^2 + 946308^2 .

It is not a de Polignac number, because 912661140889 - 2¹³ = 912661132697 is a prime.

It is a super-2 number, since 2×912661140889² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (912661140883) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 477667 + ... + 1432999.

It is an arithmetic number, because the mean of its divisors is an integer number (304220698741).

Almost surely, 2^912661140889 is an apocalyptic number.

912661140889 is the 955333-rd square number.

912661140889 is the 477667-th centered octagonal number.

It is an amenable number.

912661140889 is a deficient number, since it is larger than the sum of its proper divisors (955334).

912661140889 is an frugal number, since it uses more digits than its factorization.

912661140889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910666 (or 955333 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 912661140889 in words is "nine hundred twelve billion, six hundred sixty-one million, one hundred forty thousand, eight hundred eighty-nine".