690531683 has 4 divisors (see below), whose sum is σ = 690611088. Its totient is φ = 690452280.

The previous prime is 690531679. The next prime is 690531707. The reversal of 690531683 is 386135096.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690531683 - 2² = 690531679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690531683.

It is not an unprimeable number, because it can be changed into a prime (690531613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24791 + ... + 44672.

It is an arithmetic number, because the mean of its divisors is an integer number (172652772).

Almost surely, 2^690531683 is an apocalyptic number.

690531683 is a deficient number, since it is larger than the sum of its proper divisors (79405).

690531683 is an equidigital number, since it uses as much as digits as its factorization.

690531683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79404.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 690531683 is about 26277.9695372378. The cubic root of 690531683 is about 883.8825024010.

The spelling of 690531683 in words is "six hundred ninety million, five hundred thirty-one thousand, six hundred eighty-three".