690349031 has 8 divisors (see below), whose sum is σ = 716940720. Its totient is φ = 663943168.

The previous prime is 690349027. The next prime is 690349043. The reversal of 690349031 is 130943096.

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

It is not a de Polignac number, because 690349031 - 2² = 690349027 is a prime.

It is a super-2 number, since 2×690349031² = 953163569205277922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690348982 and 690349000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690349081) 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 7 ways as a sum of consecutive naturals, for example, 38861 + ... + 53766.

It is an arithmetic number, because the mean of its divisors is an integer number (89617590).

Almost surely, 2^690349031 is an apocalyptic number.

690349031 is a deficient number, since it is larger than the sum of its proper divisors (26591689).

690349031 is a wasteful number, since it uses less digits than its factorization.

690349031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92913.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 690349031 is about 26274.4939247172. The cubic root of 690349031 is about 883.8045638371.

The spelling of 690349031 in words is "six hundred ninety million, three hundred forty-nine thousand, thirty-one".