16196391 has 6 divisors (see below), whose sum is σ = 23394800. Its totient is φ = 10797588.

The previous prime is 16196387. The next prime is 16196431. The reversal of 16196391 is 19369161.

16196391 is a `hidden beast` number, since 1 + 6 + 19 + 639 + 1 = 666.

It is not a de Polignac number, because 16196391 - 2² = 16196387 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 (16196311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 899791 + ... + 899808.

Almost surely, 2^16196391 is an apocalyptic number.

16196391 is a deficient number, since it is larger than the sum of its proper divisors (7198409).

16196391 is a wasteful number, since it uses less digits than its factorization.

16196391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799605 (or 1799602 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 16196391 is about 4024.4740028978. The cubic root of 16196391 is about 253.0110083895.

The spelling of 16196391 in words is "sixteen million, one hundred ninety-six thousand, three hundred ninety-one".