16487591 has 2 divisors, whose sum is σ = 16487592. Its totient is φ = 16487590.

The previous prime is 16487587. The next prime is 16487593. The reversal of 16487591 is 19578461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16487591 - 2² = 16487587 is a prime.

It is a Sophie Germain prime.

Together with 16487593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16487593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8243795 + 8243796.

It is an arithmetic number, because the mean of its divisors is an integer number (8243796).

Almost surely, 2^16487591 is an apocalyptic number.

16487591 is a deficient number, since it is larger than the sum of its proper divisors (1).

16487591 is an equidigital number, since it uses as much as digits as its factorization.

16487591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 16487591 is about 4060.4914727161. The cubic root of 16487591 is about 254.5183320707.

The spelling of 16487591 in words is "sixteen million, four hundred eighty-seven thousand, five hundred ninety-one".