160392721 has 2 divisors, whose sum is σ = 160392722. Its totient is φ = 160392720.

The previous prime is 160392719. The next prime is 160392751. The reversal of 160392721 is 127293061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152769600 + 7623121 = 12360^2 + 2761^2 .

It is a cyclic number.

It is not a de Polignac number, because 160392721 - 2¹ = 160392719 is a prime.

Together with 160392719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (160392751) 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, 80196360 + 80196361.

It is an arithmetic number, because the mean of its divisors is an integer number (80196361).

Almost surely, 2^160392721 is an apocalyptic number.

It is an amenable number.

160392721 is a deficient number, since it is larger than the sum of its proper divisors (1).

160392721 is an equidigital number, since it uses as much as digits as its factorization.

160392721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 160392721 is about 12664.6247871779. The cubic root of 160392721 is about 543.3273307411.

The spelling of 160392721 in words is "one hundred sixty million, three hundred ninety-two thousand, seven hundred twenty-one".