8372991 has 16 divisors (see below), whose sum is σ = 12227328. Its totient is φ = 5054400.

The previous prime is 8372971. The next prime is 8372999. The reversal of 8372991 is 1992738.

8372991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8372991 - 2¹⁵ = 8340223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8372999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15811 + ... + 16331.

It is an arithmetic number, because the mean of its divisors is an integer number (764208).

Almost surely, 2^8372991 is an apocalyptic number.

8372991 is a deficient number, since it is larger than the sum of its proper divisors (3854337).

8372991 is a wasteful number, since it uses less digits than its factorization.

8372991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its digits is 27216, while the sum is 39.

The square root of 8372991 is about 2893.6121025459. The cubic root of 8372991 is about 203.0611656140.

It can be divided in two parts, 837 and 2991, that added together give a triangular number (3828 = T₈₇).

The spelling of 8372991 in words is "eight million, three hundred seventy-two thousand, nine hundred ninety-one".