16391867 has 4 divisors (see below), whose sum is σ = 16400160. Its totient is φ = 16383576.

The previous prime is 16391863. The next prime is 16391887. The reversal of 16391867 is 76819361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16391867 - 2² = 16391863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16391863) 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, 734 + ... + 5772.

It is an arithmetic number, because the mean of its divisors is an integer number (4100040).

Almost surely, 2^16391867 is an apocalyptic number.

16391867 is a deficient number, since it is larger than the sum of its proper divisors (8293).

16391867 is an equidigital number, since it uses as much as digits as its factorization.

16391867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8292.

The product of its digits is 54432, while the sum is 41.

The square root of 16391867 is about 4048.6870711380. The cubic root of 16391867 is about 254.0248131256.

The spelling of 16391867 in words is "sixteen million, three hundred ninety-one thousand, eight hundred sixty-seven".