16309973 has 2 divisors, whose sum is σ = 16309974. Its totient is φ = 16309972.

The previous prime is 16309939. The next prime is 16310009. The reversal of 16309973 is 37990361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16144324 + 165649 = 4018^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 16309973 - 2¹⁰ = 16308949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16309373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8154986 + 8154987.

It is an arithmetic number, because the mean of its divisors is an integer number (8154987).

Almost surely, 2^16309973 is an apocalyptic number.

It is an amenable number.

16309973 is a deficient number, since it is larger than the sum of its proper divisors (1).

16309973 is an equidigital number, since it uses as much as digits as its factorization.

16309973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 16309973 is about 4038.5607584881. The cubic root of 16309973 is about 253.6010694741.

The spelling of 16309973 in words is "sixteen million, three hundred nine thousand, nine hundred seventy-three".