16390903 has 2 divisors, whose sum is σ = 16390904. Its totient is φ = 16390902.

The previous prime is 16390879. The next prime is 16390919. The reversal of 16390903 is 30909361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16390903 - 2⁹ = 16390391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16390993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195451 + 8195452.

It is an arithmetic number, because the mean of its divisors is an integer number (8195452).

Almost surely, 2^16390903 is an apocalyptic number.

16390903 is a deficient number, since it is larger than the sum of its proper divisors (1).

16390903 is an equidigital number, since it uses as much as digits as its factorization.

16390903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 16390903 is about 4048.5680184480. The cubic root of 16390903 is about 254.0198333243.

The spelling of 16390903 in words is "sixteen million, three hundred ninety thousand, nine hundred three".