7971959 has 2 divisors, whose sum is σ = 7971960. Its totient is φ = 7971958.

The previous prime is 7971919. The next prime is 7971973. The reversal of 7971959 is 9591797.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7971959 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7971919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985979 + 3985980.

It is an arithmetic number, because the mean of its divisors is an integer number (3985980).

Almost surely, 2^7971959 is an apocalyptic number.

7971959 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971959 is an equidigital number, since it uses as much as digits as its factorization.

7971959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178605, while the sum is 47.

The square root of 7971959 is about 2823.4657780820. The cubic root of 7971959 is about 199.7660514471.

The spelling of 7971959 in words is "seven million, nine hundred seventy-one thousand, nine hundred fifty-nine".