16403887 has 2 divisors, whose sum is σ = 16403888. Its totient is φ = 16403886.

The previous prime is 16403873. The next prime is 16403923. The reversal of 16403887 is 78830461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16403887 - 2¹¹ = 16401839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16403087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201943 + 8201944.

It is an arithmetic number, because the mean of its divisors is an integer number (8201944).

Almost surely, 2^16403887 is an apocalyptic number.

16403887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16403887 is an equidigital number, since it uses as much as digits as its factorization.

16403887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 16403887 is about 4050.1712309481. The cubic root of 16403887 is about 254.0868892804.

The spelling of 16403887 in words is "sixteen million, four hundred three thousand, eight hundred eighty-seven".