7791961 has 2 divisors, whose sum is σ = 7791962. Its totient is φ = 7791960.

The previous prime is 7791929. The next prime is 7791977. The reversal of 7791961 is 1691977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4347225 + 3444736 = 2085^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 7791961 - 2⁵ = 7791929 is a prime.

It is not a weakly prime, because it can be changed into another prime (7791911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3895980 + 3895981.

It is an arithmetic number, because the mean of its divisors is an integer number (3895981).

Almost surely, 2^7791961 is an apocalyptic number.

It is an amenable number.

7791961 is a deficient number, since it is larger than the sum of its proper divisors (1).

7791961 is an equidigital number, since it uses as much as digits as its factorization.

7791961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 40.

The square root of 7791961 is about 2791.4084258668. The cubic root of 7791961 is about 198.2510928636.

The spelling of 7791961 in words is "seven million, seven hundred ninety-one thousand, nine hundred sixty-one".