16390739 has 4 divisors (see below), whose sum is σ = 16435056. Its totient is φ = 16346424.

The previous prime is 16390721. The next prime is 16390753. The reversal of 16390739 is 93709361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93709361 = 271 ⋅345791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16390739 is a prime.

It is a super-2 number, since 2×16390739² = 537312649932242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16390799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21599 + ... + 22344.

It is an arithmetic number, because the mean of its divisors is an integer number (4108764).

Almost surely, 2^16390739 is an apocalyptic number.

16390739 is a deficient number, since it is larger than the sum of its proper divisors (44317).

16390739 is an equidigital number, since it uses as much as digits as its factorization.

16390739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44316.

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

The square root of 16390739 is about 4048.5477643224. The cubic root of 16390739 is about 254.0189861188.

The spelling of 16390739 in words is "sixteen million, three hundred ninety thousand, seven hundred thirty-nine".