397612969 has 8 divisors (see below), whose sum is σ = 434065352. Its totient is φ = 361998720.

The previous prime is 397612967. The next prime is 397613009. The reversal of 397612969 is 969216793.

It can be written as a sum of positive squares in 4 ways, for example, as 86266944 + 311346025 = 9288^2 + 17645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397612969 - 2¹ = 397612967 is a prime.

It is a super-2 number, since 2×397612969² = 316192146233989922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397612967) 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 7 ways as a sum of consecutive naturals, for example, 208542 + ... + 210439.

It is an arithmetic number, because the mean of its divisors is an integer number (54258169).

Almost surely, 2^397612969 is an apocalyptic number.

397612969 is the 11513-rd hex number.

It is an amenable number.

397612969 is a deficient number, since it is larger than the sum of its proper divisors (36452383).

397612969 is a wasteful number, since it uses less digits than its factorization.

397612969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419067.

The product of its digits is 1102248, while the sum is 52.

The square root of 397612969 is about 19940.2349284054. The cubic root of 397612969 is about 735.3377249993.

The spelling of 397612969 in words is "three hundred ninety-seven million, six hundred twelve thousand, nine hundred sixty-nine".