7961431337 has 2 divisors, whose sum is σ = 7961431338. Its totient is φ = 7961431336.

The previous prime is 7961431333. The next prime is 7961431343. The reversal of 7961431337 is 7331341697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7650825961 + 310605376 = 87469^2 + 17624^2 .

It is an emirp because it is prime and its reverse (7331341697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7961431337 - 2² = 7961431333 is a prime.

It is not a weakly prime, because it can be changed into another prime (7961431333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980715668 + 3980715669.

It is an arithmetic number, because the mean of its divisors is an integer number (3980715669).

Almost surely, 2^7961431337 is an apocalyptic number.

It is an amenable number.

7961431337 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961431337 is an equidigital number, since it uses as much as digits as its factorization.

7961431337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 44.

The square root of 7961431337 is about 89226.8532281622. The cubic root of 7961431337 is about 1996.7807657958.

The spelling of 7961431337 in words is "seven billion, nine hundred sixty-one million, four hundred thirty-one thousand, three hundred thirty-seven".