16899861 has 16 divisors (see below), whose sum is σ = 25247808. Its totient is φ = 9964800.

The previous prime is 16899859. The next prime is 16899863.

16899861 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (16899859) and next prime (16899863).

It is not a de Polignac number, because 16899861 - 2¹ = 16899859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16899861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16899863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5700 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (1577988).

Almost surely, 2^16899861 is an apocalyptic number.

16899861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16899861 is a deficient number, since it is larger than the sum of its proper divisors (8347947).

16899861 is a wasteful number, since it uses less digits than its factorization.

16899861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13892.

The product of its digits is 186624, while the sum is 48.

The square root of 16899861 is about 4110.9440521613. The cubic root of 16899861 is about 256.6222908233.

The spelling of 16899861 in words is "sixteen million, eight hundred ninety-nine thousand, eight hundred sixty-one".