7312989 has 4 divisors (see below), whose sum is σ = 9750656. Its totient is φ = 4875324.

The previous prime is 7312979. The next prime is 7312997. The reversal of 7312989 is 9892137.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7312989 - 2⁵ = 7312957 is a prime.

It is a super-2 number, since 2×7312989² = 106959616228242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

7312989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7312909) 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, 1218829 + ... + 1218834.

It is an arithmetic number, because the mean of its divisors is an integer number (2437664).

Almost surely, 2^7312989 is an apocalyptic number.

It is an amenable number.

7312989 is a deficient number, since it is larger than the sum of its proper divisors (2437667).

7312989 is a wasteful number, since it uses less digits than its factorization.

7312989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437666.

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

The square root of 7312989 is about 2704.2538712185. The cubic root of 7312989 is about 194.1027283895.

The spelling of 7312989 in words is "seven million, three hundred twelve thousand, nine hundred eighty-nine".