679791969 has 12 divisors (see below), whose sum is σ = 982308496. Its totient is φ = 453016152.

The previous prime is 679791961. The next prime is 679791977. The reversal of 679791969 is 969197976.

It is an interprime number because it is at equal distance from previous prime (679791961) and next prime (679791977).

It is not a de Polignac number, because 679791969 - 2³ = 679791961 is a prime.

It is a super-2 number, since 2×679791969² = 924234242233793922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679791961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11754 + ... + 38700.

Almost surely, 2^679791969 is an apocalyptic number.

It is an amenable number.

679791969 is a deficient number, since it is larger than the sum of its proper divisors (302516527).

679791969 is a wasteful number, since it uses less digits than its factorization.

679791969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29756 (or 29753 counting only the distinct ones).

The product of its digits is 11573604, while the sum is 63.

The square root of 679791969 is about 26072.8205033518. The cubic root of 679791969 is about 879.2762510822.

The spelling of 679791969 in words is "six hundred seventy-nine million, seven hundred ninety-one thousand, nine hundred sixty-nine".