16390971 has 16 divisors (see below), whose sum is σ = 25067520. Its totient is φ = 10574280.

The previous prime is 16390961. The next prime is 16390993. The reversal of 16390971 is 17909361.

It is not a de Polignac number, because 16390971 - 2⁹ = 16390459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16390931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8955 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (1566720).

Almost surely, 2^16390971 is an apocalyptic number.

16390971 is a deficient number, since it is larger than the sum of its proper divisors (8676549).

16390971 is a wasteful number, since it uses less digits than its factorization.

16390971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19623 (or 19617 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 16390971 is about 4048.5764164704. The cubic root of 16390971 is about 254.0201846030.

The spelling of 16390971 in words is "sixteen million, three hundred ninety thousand, nine hundred seventy-one".