3160161721 has 2 divisors, whose sum is σ = 3160161722. Its totient is φ = 3160161720.

The previous prime is 3160161707. The next prime is 3160161727. The reversal of 3160161721 is 1271610613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1649984400 + 1510177321 = 40620^2 + 38861^2 .

It is a cyclic number.

It is not a de Polignac number, because 3160161721 - 2²³ = 3151773113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3160161721.

It is not a weakly prime, because it can be changed into another prime (3160161727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580080860 + 1580080861.

It is an arithmetic number, because the mean of its divisors is an integer number (1580080861).

Almost surely, 2^3160161721 is an apocalyptic number.

It is an amenable number.

3160161721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3160161721 is an equidigital number, since it uses as much as digits as its factorization.

3160161721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 3160161721 is about 56215.3157155592. The cubic root of 3160161721 is about 1467.4718172563.

The spelling of 3160161721 in words is "three billion, one hundred sixty million, one hundred sixty-one thousand, seven hundred twenty-one".