7991929 has 9 divisors (see below), whose sum is σ = 8818831. Its totient is φ = 7237120.

The previous prime is 7991897. The next prime is 7991939. The reversal of 7991929 is 9291997.

The square root of 7991929 is 2827.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7868025 + 123904 = 2805^2 + 352^2 .

It is not a de Polignac number, because 7991929 - 2⁵ = 7991897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7991939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30969 + ... + 31225.

Almost surely, 2^7991929 is an apocalyptic number.

7991929 is the 2827-th square number.

7991929 is the 1414-th centered octagonal number.

It is an amenable number.

7991929 is a deficient number, since it is larger than the sum of its proper divisors (826902).

7991929 is an equidigital number, since it uses as much as digits as its factorization.

7991929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 268 counting only the distinct ones).

The product of its digits is 91854, while the sum is 46.

The cubic root of 7991929 is about 199.9327190356.

It can be divided in two parts, 7 and 991929, that added together give a triangular number (991936 = T₁₄₀₈).

The spelling of 7991929 in words is "seven million, nine hundred ninety-one thousand, nine hundred twenty-nine".