679149131 has 4 divisors (see below), whose sum is σ = 679969200. Its totient is φ = 678329064.

The previous prime is 679149127. The next prime is 679149169. The reversal of 679149131 is 131941976.

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 679149131 - 2² = 679149127 is a prime.

It is a super-2 number, since 2×679149131² = 922487084276110322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679149631) 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, 408791 + ... + 410448.

It is an arithmetic number, because the mean of its divisors is an integer number (169992300).

Almost surely, 2^679149131 is an apocalyptic number.

679149131 is a deficient number, since it is larger than the sum of its proper divisors (820069).

679149131 is an equidigital number, since it uses as much as digits as its factorization.

679149131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820068.

The product of its digits is 40824, while the sum is 41.

The square root of 679149131 is about 26060.4898457416. The cubic root of 679149131 is about 878.9990042799. Note that the first 3 decimals are identical.

The spelling of 679149131 in words is "six hundred seventy-nine million, one hundred forty-nine thousand, one hundred thirty-one".