16391199 has 8 divisors (see below), whose sum is σ = 23841792. Its totient is φ = 9934040.

The previous prime is 16391197. The next prime is 16391227. The reversal of 16391199 is 99119361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16391199 - 2¹ = 16391197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248319 + ... + 248384.

It is an arithmetic number, because the mean of its divisors is an integer number (2980224).

Almost surely, 2^16391199 is an apocalyptic number.

16391199 is a deficient number, since it is larger than the sum of its proper divisors (7450593).

16391199 is a wasteful number, since it uses less digits than its factorization.

16391199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496717.

The product of its digits is 13122, while the sum is 39.

The square root of 16391199 is about 4048.6045744182. The cubic root of 16391199 is about 254.0213624127.

The spelling of 16391199 in words is "sixteen million, three hundred ninety-one thousand, one hundred ninety-nine".