7975389 has 4 divisors (see below), whose sum is σ = 10633856. Its totient is φ = 5316924.

The previous prime is 7975369. The next prime is 7975399. The reversal of 7975389 is 9835797.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9835797 = 3 ⋅3278599.

It is not a de Polignac number, because 7975389 - 2⁸ = 7975133 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7975309) 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, 1329229 + ... + 1329234.

It is an arithmetic number, because the mean of its divisors is an integer number (2658464).

Almost surely, 2^7975389 is an apocalyptic number.

It is an amenable number.

7975389 is a deficient number, since it is larger than the sum of its proper divisors (2658467).

7975389 is a wasteful number, since it uses less digits than its factorization.

7975389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658466.

The product of its digits is 476280, while the sum is 48.

The square root of 7975389 is about 2824.0731222828. The cubic root of 7975389 is about 199.7946976602.

The spelling of 7975389 in words is "seven million, nine hundred seventy-five thousand, three hundred eighty-nine".