7911971 has 2 divisors, whose sum is σ = 7911972. Its totient is φ = 7911970.

The previous prime is 7911907. The next prime is 7911989. The reversal of 7911971 is 1791197.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7911971 - 2⁶ = 7911907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7911571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3955985 + 3955986.

It is an arithmetic number, because the mean of its divisors is an integer number (3955986).

Almost surely, 2^7911971 is an apocalyptic number.

7911971 is a deficient number, since it is larger than the sum of its proper divisors (1).

7911971 is an equidigital number, since it uses as much as digits as its factorization.

7911971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969, while the sum is 35.

The square root of 7911971 is about 2812.8226037203. The cubic root of 7911971 is about 199.2637177686.

The spelling of 7911971 in words is "seven million, nine hundred eleven thousand, nine hundred seventy-one".