7975891 has 8 divisors (see below), whose sum is σ = 9944064. Its totient is φ = 6214920.

The previous prime is 7975889. The next prime is 7975921. The reversal of 7975891 is 1985797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7975891 - 2¹ = 7975889 is a prime.

It is a super-2 number, since 2×7975891² = 127229674487762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7975861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51715 + ... + 51868.

It is an arithmetic number, because the mean of its divisors is an integer number (1243008).

Almost surely, 2^7975891 is an apocalyptic number.

7975891 is a deficient number, since it is larger than the sum of its proper divisors (1968173).

7975891 is a wasteful number, since it uses less digits than its factorization.

7975891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103601.

The product of its digits is 158760, while the sum is 46.

The square root of 7975891 is about 2824.1619996027. The cubic root of 7975891 is about 199.7988895073.

The spelling of 7975891 in words is "seven million, nine hundred seventy-five thousand, eight hundred ninety-one".