7975889 has 2 divisors, whose sum is σ = 7975890. Its totient is φ = 7975888.

The previous prime is 7975883. The next prime is 7975921. The reversal of 7975889 is 9885797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 180625 = 2792^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 7975889 - 2⁸ = 7975633 is a prime.

It is a super-2 number, since 2×7975889² = 127229610680642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7975889.

It is not a weakly prime, because it can be changed into another prime (7975883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3987944 + 3987945.

It is an arithmetic number, because the mean of its divisors is an integer number (3987945).

Almost surely, 2^7975889 is an apocalyptic number.

It is an amenable number.

7975889 is a deficient number, since it is larger than the sum of its proper divisors (1).

7975889 is an equidigital number, since it uses as much as digits as its factorization.

7975889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 53.

The square root of 7975889 is about 2824.1616455154. The cubic root of 7975889 is about 199.7988728071.

The spelling of 7975889 in words is "seven million, nine hundred seventy-five thousand, eight hundred eighty-nine".