8691972 has 12 divisors (see below), whose sum is σ = 20281296. Its totient is φ = 2897320.

The previous prime is 8691971. The next prime is 8691973. The reversal of 8691972 is 2791968.

It is an interprime number because it is at equal distance from previous prime (8691971) and next prime (8691973).

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

It is not an unprimeable number, because it can be changed into a prime (8691971) 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, 362154 + ... + 362177.

It is an arithmetic number, because the mean of its divisors is an integer number (1690108).

Almost surely, 2^8691972 is an apocalyptic number.

It is an amenable number.

8691972 is an abundant number, since it is smaller than the sum of its proper divisors (11589324).

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

8691972 is a wasteful number, since it uses less digits than its factorization.

8691972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724338 (or 724336 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 8691972 is about 2948.2150532144. The cubic root of 8691972 is about 205.6077305859.

The spelling of 8691972 in words is "eight million, six hundred ninety-one thousand, nine hundred seventy-two".