7961939 has 2 divisors, whose sum is σ = 7961940. Its totient is φ = 7961938.

The previous prime is 7961929. The next prime is 7961951. The reversal of 7961939 is 9391697.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7961939 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7961939.

It is not a weakly prime, because it can be changed into another prime (7961929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980969 + 3980970.

It is an arithmetic number, because the mean of its divisors is an integer number (3980970).

Almost surely, 2^7961939 is an apocalyptic number.

7961939 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961939 is an equidigital number, since it uses as much as digits as its factorization.

7961939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 44.

The square root of 7961939 is about 2821.6908051734. The cubic root of 7961939 is about 199.6823206664.

The spelling of 7961939 in words is "seven million, nine hundred sixty-one thousand, nine hundred thirty-nine".