690531707 has 2 divisors, whose sum is σ = 690531708. Its totient is φ = 690531706.

The previous prime is 690531679. The next prime is 690531713. The reversal of 690531707 is 707135096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690531707 - 2⁶ = 690531643 is a prime.

It is equal to p_35788016 and since 690531707 and 35788016 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (690531767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345265853 + 345265854.

It is an arithmetic number, because the mean of its divisors is an integer number (345265854).

Almost surely, 2^690531707 is an apocalyptic number.

690531707 is a deficient number, since it is larger than the sum of its proper divisors (1).

690531707 is an equidigital number, since it uses as much as digits as its factorization.

690531707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 690531707 is about 26277.9699938941. The cubic root of 690531707 is about 883.8825126411.

The spelling of 690531707 in words is "six hundred ninety million, five hundred thirty-one thousand, seven hundred seven".