8612991 has 6 divisors (see below), whose sum is σ = 12441000. Its totient is φ = 5741988.

The previous prime is 8612983. The next prime is 8613001. The reversal of 8612991 is 1992168.

8612991 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 8612991 - 2³ = 8612983 is a prime.

It is a super-2 number, since 2×8612991² = 148367227932162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8612941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 478491 + ... + 478508.

It is an arithmetic number, because the mean of its divisors is an integer number (2073500).

Almost surely, 2^8612991 is an apocalyptic number.

8612991 is a deficient number, since it is larger than the sum of its proper divisors (3828009).

8612991 is a wasteful number, since it uses less digits than its factorization.

8612991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957005 (or 957002 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 8612991 is about 2934.7897710058. The cubic root of 8612991 is about 204.9830721695.

The spelling of 8612991 in words is "eight million, six hundred twelve thousand, nine hundred ninety-one".