16573987 has 2 divisors, whose sum is σ = 16573988. Its totient is φ = 16573986.

The previous prime is 16573981. The next prime is 16574017. The reversal of 16573987 is 78937561.

It is a weak prime.

It is an emirp because it is prime and its reverse (78937561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16573987 - 2⁷ = 16573859 is a prime.

It is not a weakly prime, because it can be changed into another prime (16573981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8286993 + 8286994.

It is an arithmetic number, because the mean of its divisors is an integer number (8286994).

Almost surely, 2^16573987 is an apocalyptic number.

16573987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16573987 is an equidigital number, since it uses as much as digits as its factorization.

16573987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 16573987 is about 4071.1161860109. The cubic root of 16573987 is about 254.9621217607.

The spelling of 16573987 in words is "sixteen million, five hundred seventy-three thousand, nine hundred eighty-seven".