16037921 has 2 divisors, whose sum is σ = 16037922. Its totient is φ = 16037920.

The previous prime is 16037873. The next prime is 16037927. The reversal of 16037921 is 12973061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 6027025 = 3164^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 16037921 - 2¹⁰ = 16036897 is a prime.

It is not a weakly prime, because it can be changed into another prime (16037927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8018960 + 8018961.

It is an arithmetic number, because the mean of its divisors is an integer number (8018961).

Almost surely, 2^16037921 is an apocalyptic number.

It is an amenable number.

16037921 is a deficient number, since it is larger than the sum of its proper divisors (1).

16037921 is an equidigital number, since it uses as much as digits as its factorization.

16037921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 16037921 is about 4004.7373197252. The cubic root of 16037921 is about 252.1831256896.

The spelling of 16037921 in words is "sixteen million, thirty-seven thousand, nine hundred twenty-one".