160939921 has 2 divisors, whose sum is σ = 160939922. Its totient is φ = 160939920.

The previous prime is 160939903. The next prime is 160939939. The reversal of 160939921 is 129939061.

It is a balanced prime because it is at equal distance from previous prime (160939903) and next prime (160939939).

It can be written as a sum of positive squares in only one way, i.e., 80640400 + 80299521 = 8980^2 + 8961^2 .

It is a cyclic number.

It is not a de Polignac number, because 160939921 - 2²⁷ = 26722193 is a prime.

It is not a weakly prime, because it can be changed into another prime (160939991) 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, 80469960 + 80469961.

It is an arithmetic number, because the mean of its divisors is an integer number (80469961).

Almost surely, 2^160939921 is an apocalyptic number.

It is an amenable number.

160939921 is a deficient number, since it is larger than the sum of its proper divisors (1).

160939921 is an equidigital number, since it uses as much as digits as its factorization.

160939921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 160939921 is about 12686.2098752937. The cubic root of 160939921 is about 543.9445059904.

The spelling of 160939921 in words is "one hundred sixty million, nine hundred thirty-nine thousand, nine hundred twenty-one".