690626031 has 4 divisors (see below), whose sum is σ = 920834712. Its totient is φ = 460417352.

The previous prime is 690626023. The next prime is 690626033. The reversal of 690626031 is 130626096.

It is a happy number.

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 690626031 - 2³ = 690626023 is a prime.

It is a super-2 number, since 2×690626031² = 953928629389625922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690625983 and 690626001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690626033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115104336 + ... + 115104341.

It is an arithmetic number, because the mean of its divisors is an integer number (230208678).

Almost surely, 2^690626031 is an apocalyptic number.

690626031 is a deficient number, since it is larger than the sum of its proper divisors (230208681).

690626031 is a wasteful number, since it uses less digits than its factorization.

690626031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230208680.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 690626031 is about 26279.7646678961. The cubic root of 690626031 is about 883.9227558032.

The spelling of 690626031 in words is "six hundred ninety million, six hundred twenty-six thousand, thirty-one".