690318623 has 2 divisors, whose sum is σ = 690318624. Its totient is φ = 690318622.

The previous prime is 690318617. The next prime is 690318637. The reversal of 690318623 is 326813096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690318623 - 2¹⁰ = 690317599 is a prime.

It is a super-2 number, since 2×690318623² = 953079602521232258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690318023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345159311 + 345159312.

It is an arithmetic number, because the mean of its divisors is an integer number (345159312).

Almost surely, 2^690318623 is an apocalyptic number.

690318623 is a deficient number, since it is larger than the sum of its proper divisors (1).

690318623 is an equidigital number, since it uses as much as digits as its factorization.

690318623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 690318623 is about 26273.9152582937. The cubic root of 690318623 is about 883.7915872496.

The spelling of 690318623 in words is "six hundred ninety million, three hundred eighteen thousand, six hundred twenty-three".