16499887 has 2 divisors, whose sum is σ = 16499888. Its totient is φ = 16499886.

The previous prime is 16499863. The next prime is 16499897. The reversal of 16499887 is 78899461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16499887 - 2⁷ = 16499759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16499807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8249943 + 8249944.

It is an arithmetic number, because the mean of its divisors is an integer number (8249944).

Almost surely, 2^16499887 is an apocalyptic number.

16499887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16499887 is an equidigital number, since it uses as much as digits as its factorization.

16499887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 16499887 is about 4062.0052929557. The cubic root of 16499887 is about 254.5815873143.

The spelling of 16499887 in words is "sixteen million, four hundred ninety-nine thousand, eight hundred eighty-seven".