7975391 has 4 divisors (see below), whose sum is σ = 7987752. Its totient is φ = 7963032.

The previous prime is 7975369. The next prime is 7975399. The reversal of 7975391 is 1935797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1935797 = 409 ⋅4733.

It is a cyclic number.

It is not a de Polignac number, because 7975391 - 2⁶ = 7975327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7975399) 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, 5156 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (1996938).

Almost surely, 2^7975391 is an apocalyptic number.

7975391 is a deficient number, since it is larger than the sum of its proper divisors (12361).

7975391 is a wasteful number, since it uses less digits than its factorization.

7975391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12360.

The product of its digits is 59535, while the sum is 41.

The square root of 7975391 is about 2824.0734763812. The cubic root of 7975391 is about 199.7947143611.

The spelling of 7975391 in words is "seven million, nine hundred seventy-five thousand, three hundred ninety-one".