397294477969 has 9 divisors (see below), whose sum is σ = 403953366609. Its totient is φ = 390743634960.

The previous prime is 397294477967. The next prime is 397294477999. The reversal of 397294477969 is 969774492793.

The square root of 397294477969 is 630313.

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 48353811025 + 348940666944 = 219895^2 + 590712^2 .

It is not a de Polignac number, because 397294477969 - 2¹ = 397294477967 is a prime.

It is a super-2 number, since 2×397294477969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397294477895 and 397294477904.

It is not an unprimeable number, because it can be changed into a prime (397294477961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38443927 + ... + 38454259.

It is an arithmetic number, because the mean of its divisors is an integer number (44883707401).

Almost surely, 2^397294477969 is an apocalyptic number.

397294477969 is the 630313-rd square number.

397294477969 is the 315157-th centered octagonal number.

It is an amenable number.

397294477969 is a deficient number, since it is larger than the sum of its proper divisors (6658888640).

397294477969 is an frugal number, since it uses more digits than its factorization.

397294477969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20788 (or 10394 counting only the distinct ones).

The product of its digits is 1296243648, while the sum is 76.

The spelling of 397294477969 in words is "three hundred ninety-seven billion, two hundred ninety-four million, four hundred seventy-seven thousand, nine hundred sixty-nine".