16399207 has 16 divisors (see below), whose sum is σ = 19035648. Its totient is φ = 13979680.

The previous prime is 16399183. The next prime is 16399247. The reversal of 16399207 is 70299361.

It is not a de Polignac number, because 16399207 - 2⁷ = 16399079 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 (16399247) 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, 12798 + ... + 14020.

It is an arithmetic number, because the mean of its divisors is an integer number (1189728).

Almost surely, 2^16399207 is an apocalyptic number.

16399207 is a deficient number, since it is larger than the sum of its proper divisors (2636441).

16399207 is a wasteful number, since it uses less digits than its factorization.

16399207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 16399207 is about 4049.5934363835. The cubic root of 16399207 is about 254.0627234684.

The spelling of 16399207 in words is "sixteen million, three hundred ninety-nine thousand, two hundred seven".