397693469 has 2 divisors, whose sum is σ = 397693470. Its totient is φ = 397693468.

The previous prime is 397693411. The next prime is 397693477. The reversal of 397693469 is 964396793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381733444 + 15960025 = 19538^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 397693469 - 2¹² = 397689373 is a prime.

It is a super-2 number, since 2×397693469² = 316320190570507922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397693409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198846734 + 198846735.

It is an arithmetic number, because the mean of its divisors is an integer number (198846735).

Almost surely, 2^397693469 is an apocalyptic number.

It is an amenable number.

397693469 is a deficient number, since it is larger than the sum of its proper divisors (1).

397693469 is an equidigital number, since it uses as much as digits as its factorization.

397693469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6613488, while the sum is 56.

The square root of 397693469 is about 19942.2533581338. The cubic root of 397693469 is about 735.3873466977.

The spelling of 397693469 in words is "three hundred ninety-seven million, six hundred ninety-three thousand, four hundred sixty-nine".