7917972 has 12 divisors (see below), whose sum is σ = 18475296. Its totient is φ = 2639320.

The previous prime is 7917967. The next prime is 7917997. The reversal of 7917972 is 2797197.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329904 + ... + 329927.

It is an arithmetic number, because the mean of its divisors is an integer number (1539608).

Almost surely, 2^7917972 is an apocalyptic number.

It is an amenable number.

7917972 is an abundant number, since it is smaller than the sum of its proper divisors (10557324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7917972 is a wasteful number, since it uses less digits than its factorization.

7917972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659838 (or 659836 counting only the distinct ones).

The product of its digits is 55566, while the sum is 42.

The square root of 7917972 is about 2813.8891236152. The cubic root of 7917972 is about 199.3140836162.

The spelling of 7917972 in words is "seven million, nine hundred seventeen thousand, nine hundred seventy-two".