351690431 has 2 divisors, whose sum is σ = 351690432. Its totient is φ = 351690430.

The previous prime is 351690403. The next prime is 351690463. The reversal of 351690431 is 134096153.

It is an a-pointer prime, because the next prime (351690463) can be obtained adding 351690431 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 351690431 - 2²⁶ = 284581567 is a prime.

It is a super-2 number, since 2×351690431² = 247372318513931522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351690481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175845215 + 175845216.

It is an arithmetic number, because the mean of its divisors is an integer number (175845216).

Almost surely, 2^351690431 is an apocalyptic number.

351690431 is a deficient number, since it is larger than the sum of its proper divisors (1).

351690431 is an equidigital number, since it uses as much as digits as its factorization.

351690431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 351690431 is about 18753.4111830355. The cubic root of 351690431 is about 705.8626202957.

The spelling of 351690431 in words is "three hundred fifty-one million, six hundred ninety thousand, four hundred thirty-one".