679647031 has 4 divisors (see below), whose sum is σ = 776739472. Its totient is φ = 582554592.

The previous prime is 679647013. The next prime is 679647041. The reversal of 679647031 is 130746976.

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 679647031 - 2¹¹ = 679644983 is a prime.

It is a super-2 number, since 2×679647031² = 923840173494229922, 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 (679647011) 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, 48546210 + ... + 48546223.

It is an arithmetic number, because the mean of its divisors is an integer number (194184868).

Almost surely, 2^679647031 is an apocalyptic number.

679647031 is a deficient number, since it is larger than the sum of its proper divisors (97092441).

679647031 is an equidigital number, since it uses as much as digits as its factorization.

679647031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97092440.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 679647031 is about 26070.0408707006. The cubic root of 679647031 is about 879.2137566695.

The spelling of 679647031 in words is "six hundred seventy-nine million, six hundred forty-seven thousand, thirty-one".