690017131 has 4 divisors (see below), whose sum is σ = 730606392. Its totient is φ = 649427872.

The previous prime is 690017117. The next prime is 690017149. The reversal of 690017131 is 131710096.

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 690017131 - 2⁵ = 690017099 is a prime.

It is a super-2 number, since 2×690017131² = 952247282146942322, which contains 22 as substring.

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 690017131.

It is not an unprimeable number, because it can be changed into a prime (690017231) 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, 20294605 + ... + 20294638.

It is an arithmetic number, because the mean of its divisors is an integer number (182651598).

Almost surely, 2^690017131 is an apocalyptic number.

690017131 is a deficient number, since it is larger than the sum of its proper divisors (40589261).

690017131 is a wasteful number, since it uses less digits than its factorization.

690017131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40589260.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 690017131 is about 26268.1771541156. The cubic root of 690017131 is about 883.6629051769.

The spelling of 690017131 in words is "six hundred ninety million, seventeen thousand, one hundred thirty-one".