1447117681 has 9 divisors (see below), whose sum is σ = 1464712641. Its totient is φ = 1429732944.

The previous prime is 1447117649. The next prime is 1447117687. The reversal of 1447117681 is 1867117441.

The square root of 1447117681 is 38041.

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 269255281 + 1177862400 = 16409^2 + 34320^2 .

It is not a de Polignac number, because 1447117681 - 2⁵ = 1447117649 is a prime.

It is a super-2 number, since 2×1447117681² = 4188299165325635522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1447117687) 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, 4146295 + ... + 4146643.

It is an arithmetic number, because the mean of its divisors is an integer number (162745849).

Almost surely, 2^1447117681 is an apocalyptic number.

1447117681 is the 38041-st square number.

1447117681 is the 19021-st centered octagonal number.

It is an amenable number.

1447117681 is a deficient number, since it is larger than the sum of its proper divisors (17594960).

1447117681 is an frugal number, since it uses more digits than its factorization.

1447117681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 458 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The cubic root of 1447117681 is about 1131.1007315396.

The spelling of 1447117681 in words is "one billion, four hundred forty-seven million, one hundred seventeen thousand, six hundred eighty-one".