346638731 has 2 divisors, whose sum is σ = 346638732. Its totient is φ = 346638730.

The previous prime is 346638673. The next prime is 346638737. The reversal of 346638731 is 137836643.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 346638731 - 2⁶ = 346638667 is a prime.

It is a super-2 number, since 2×346638731² = 240316819658580722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (346638737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173319365 + 173319366.

It is an arithmetic number, because the mean of its divisors is an integer number (173319366).

Almost surely, 2^346638731 is an apocalyptic number.

346638731 is a deficient number, since it is larger than the sum of its proper divisors (1).

346638731 is an equidigital number, since it uses as much as digits as its factorization.

346638731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 346638731 is about 18618.2365169207. The cubic root of 346638731 is about 702.4666252302.

The spelling of 346638731 in words is "three hundred forty-six million, six hundred thirty-eight thousand, seven hundred thirty-one".