690625499 has 2 divisors, whose sum is σ = 690625500. Its totient is φ = 690625498.

The previous prime is 690625447. The next prime is 690625501. The reversal of 690625499 is 994526096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690625499 is a prime.

Together with 690625501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (690625399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345312749 + 345312750.

It is an arithmetic number, because the mean of its divisors is an integer number (345312750).

Almost surely, 2^690625499 is an apocalyptic number.

690625499 is a deficient number, since it is larger than the sum of its proper divisors (1).

690625499 is an equidigital number, since it uses as much as digits as its factorization.

690625499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 690625499 is about 26279.7545460379. The cubic root of 690625499 is about 883.9225288367.

The spelling of 690625499 in words is "six hundred ninety million, six hundred twenty-five thousand, four hundred ninety-nine".