7991953 has 2 divisors, whose sum is σ = 7991954. Its totient is φ = 7991952.

The previous prime is 7991947. The next prime is 7991957. The reversal of 7991953 is 3591997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6012304 + 1979649 = 2452^2 + 1407^2 .

It is a cyclic number.

It is not a de Polignac number, because 7991953 - 2⁹ = 7991441 is a prime.

It is not a weakly prime, because it can be changed into another prime (7991957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995976 + 3995977.

It is an arithmetic number, because the mean of its divisors is an integer number (3995977).

Almost surely, 2^7991953 is an apocalyptic number.

It is an amenable number.

7991953 is a deficient number, since it is larger than the sum of its proper divisors (1).

7991953 is an equidigital number, since it uses as much as digits as its factorization.

7991953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76545, while the sum is 43.

The square root of 7991953 is about 2827.0042447793. The cubic root of 7991953 is about 199.9329191700.

The spelling of 7991953 in words is "seven million, nine hundred ninety-one thousand, nine hundred fifty-three".