7989131 has 4 divisors (see below), whose sum is σ = 8124600. Its totient is φ = 7853664.

The previous prime is 7989083. The next prime is 7989143. The reversal of 7989131 is 1319897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1319897 = 17 ⋅77641.

It is a cyclic number.

It is not a de Polignac number, because 7989131 - 2⁶ = 7989067 is a prime.

It is a super-2 number, since 2×7989131² = 127652428270322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7989431) 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, 67646 + ... + 67763.

It is an arithmetic number, because the mean of its divisors is an integer number (2031150).

Almost surely, 2^7989131 is an apocalyptic number.

7989131 is a deficient number, since it is larger than the sum of its proper divisors (135469).

7989131 is a wasteful number, since it uses less digits than its factorization.

7989131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135468.

The product of its digits is 13608, while the sum is 38.

The square root of 7989131 is about 2826.5050857906. The cubic root of 7989131 is about 199.9093839499.

The spelling of 7989131 in words is "seven million, nine hundred eighty-nine thousand, one hundred thirty-one".