16898887 has 4 divisors (see below), whose sum is σ = 16986640. Its totient is φ = 16811136.

The previous prime is 16898879. The next prime is 16898911. The reversal of 16898887 is 78889861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78889861 = 1987 ⋅39703.

It is a cyclic number.

It is not a de Polignac number, because 16898887 - 2³ = 16898879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16898587) 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, 43587 + ... + 43972.

It is an arithmetic number, because the mean of its divisors is an integer number (4246660).

Almost surely, 2^16898887 is an apocalyptic number.

16898887 is a deficient number, since it is larger than the sum of its proper divisors (87753).

16898887 is an equidigital number, since it uses as much as digits as its factorization.

16898887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87752.

The product of its digits is 1548288, while the sum is 55.

The square root of 16898887 is about 4110.8255861810. The cubic root of 16898887 is about 256.6173607056.

The spelling of 16898887 in words is "sixteen million, eight hundred ninety-eight thousand, eight hundred eighty-seven".