16069491 has 12 divisors (see below), whose sum is σ = 23268232. Its totient is φ = 10686816.

The previous prime is 16069489. The next prime is 16069511. The reversal of 16069491 is 19496061.

16069491 is a `hidden beast` number, since 1 + 606 + 9 + 49 + 1 = 666.

It is not a de Polignac number, because 16069491 - 2¹ = 16069489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16069091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2160 + ... + 6066.

Almost surely, 2^16069491 is an apocalyptic number.

16069491 is a deficient number, since it is larger than the sum of its proper divisors (7198741).

16069491 is a wasteful number, since it uses less digits than its factorization.

16069491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4367 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16069491 is about 4008.6769637874. The cubic root of 16069491 is about 252.3484880013.

The spelling of 16069491 in words is "sixteen million, sixty-nine thousand, four hundred ninety-one".