16172487 has 8 divisors (see below), whose sum is σ = 23959280. Its totient is φ = 10781640.

The previous prime is 16172479. The next prime is 16172489. The reversal of 16172487 is 78427161.

16172487 is a `hidden beast` number, since 1 + 6 + 172 + 487 = 666.

It is not a de Polignac number, because 16172487 - 2³ = 16172479 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 (16172489) 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, 299464 + ... + 299517.

It is an arithmetic number, because the mean of its divisors is an integer number (2994910).

Almost surely, 2^16172487 is an apocalyptic number.

16172487 is a deficient number, since it is larger than the sum of its proper divisors (7786793).

16172487 is an equidigital number, since it uses as much as digits as its factorization.

16172487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598990 (or 598984 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 16172487 is about 4021.5030772088. The cubic root of 16172487 is about 252.8864754415.

The spelling of 16172487 in words is "sixteen million, one hundred seventy-two thousand, four hundred eighty-seven".