797144661 has 6 divisors (see below), whose sum is σ = 1151431190. Its totient is φ = 531429768.

The previous prime is 797144659. The next prime is 797144683. The reversal of 797144661 is 166441797.

It can be written as a sum of positive squares in only one way, i.e., 462035025 + 335109636 = 21495^2 + 18306^2 .

It is not a de Polignac number, because 797144661 - 2¹ = 797144659 is a prime.

It is a super-2 number, since 2×797144661² = 1270879221121609842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797144611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44285806 + ... + 44285823.

Almost surely, 2^797144661 is an apocalyptic number.

It is an amenable number.

797144661 is a deficient number, since it is larger than the sum of its proper divisors (354286529).

797144661 is a wasteful number, since it uses less digits than its factorization.

797144661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88571635 (or 88571632 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 797144661 is about 28233.7503884978. The cubic root of 797144661 is about 927.2120076603.

The spelling of 797144661 in words is "seven hundred ninety-seven million, one hundred forty-four thousand, six hundred sixty-one".