16938487 has 4 divisors (see below), whose sum is σ = 17225640. Its totient is φ = 16651336.

The previous prime is 16938479. The next prime is 16938499. The reversal of 16938487 is 78483961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16938487 - 2³ = 16938479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16938437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143488 + ... + 143605.

It is an arithmetic number, because the mean of its divisors is an integer number (4306410).

Almost surely, 2^16938487 is an apocalyptic number.

16938487 is a deficient number, since it is larger than the sum of its proper divisors (287153).

16938487 is an equidigital number, since it uses as much as digits as its factorization.

16938487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287152.

The product of its digits is 290304, while the sum is 46.

The square root of 16938487 is about 4115.6393185020. The cubic root of 16938487 is about 256.8176523985.

The spelling of 16938487 in words is "sixteen million, nine hundred thirty-eight thousand, four hundred eighty-seven".