791651979 has 18 divisors (see below), whose sum is σ = 1150536660. Its totient is φ = 524538768.

The previous prime is 791651921. The next prime is 791652011. The reversal of 791651979 is 979156197.

It is a happy number.

It is not a de Polignac number, because 791651979 - 2¹⁶ = 791586443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (791651779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 267892 + ... + 270830.

Almost surely, 2^791651979 is an apocalyptic number.

791651979 is a deficient number, since it is larger than the sum of its proper divisors (358884681).

791651979 is a wasteful number, since it uses less digits than its factorization.

791651979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3115 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 54.

The square root of 791651979 is about 28136.3106856603. The cubic root of 791651979 is about 925.0774628091.

It can be divided in two parts, 7916 and 51979, that added together give a palindrome (59895).

The spelling of 791651979 in words is "seven hundred ninety-one million, six hundred fifty-one thousand, nine hundred seventy-nine".