690940231 has 8 divisors (see below), whose sum is σ = 732145824. Its totient is φ = 649797120.

The previous prime is 690940177. The next prime is 690940273. The reversal of 690940231 is 132049096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690940231 - 2¹⁵ = 690907463 is a prime.

It is a super-2 number, since 2×690940231² = 954796805628666722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690940291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8206 + ... + 38068.

It is an arithmetic number, because the mean of its divisors is an integer number (91518228).

Almost surely, 2^690940231 is an apocalyptic number.

690940231 is a deficient number, since it is larger than the sum of its proper divisors (41205593).

690940231 is a wasteful number, since it uses less digits than its factorization.

690940231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31241.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 690940231 is about 26285.7419716469. The cubic root of 690940231 is about 884.0567822326.

The spelling of 690940231 in words is "six hundred ninety million, nine hundred forty thousand, two hundred thirty-one".