16399703 has 4 divisors (see below), whose sum is σ = 16965240. Its totient is φ = 15834168.

The previous prime is 16399681. The next prime is 16399729. The reversal of 16399703 is 30799361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30799361 = 19 ⋅1621019.

It is a cyclic number.

It is not a de Polignac number, because 16399703 - 2¹² = 16395607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16399753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282725 + ... + 282782.

It is an arithmetic number, because the mean of its divisors is an integer number (4241310).

Almost surely, 2^16399703 is an apocalyptic number.

16399703 is a deficient number, since it is larger than the sum of its proper divisors (565537).

16399703 is an equidigital number, since it uses as much as digits as its factorization.

16399703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565536.

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

The square root of 16399703 is about 4049.6546766360. The cubic root of 16399703 is about 254.0652848492.

The spelling of 16399703 in words is "sixteen million, three hundred ninety-nine thousand, seven hundred three".