16387487 has 2 divisors, whose sum is σ = 16387488. Its totient is φ = 16387486.

The previous prime is 16387457. The next prime is 16387489. The reversal of 16387487 is 78478361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16387487 - 2¹² = 16383391 is a prime.

Together with 16387489, 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 (16387489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8193743 + 8193744.

It is an arithmetic number, because the mean of its divisors is an integer number (8193744).

Almost surely, 2^16387487 is an apocalyptic number.

16387487 is a deficient number, since it is larger than the sum of its proper divisors (1).

16387487 is an equidigital number, since it uses as much as digits as its factorization.

16387487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 16387487 is about 4048.1461189043. The cubic root of 16387487 is about 254.0021854856.

The spelling of 16387487 in words is "sixteen million, three hundred eighty-seven thousand, four hundred eighty-seven".