16698431 has 4 divisors (see below), whose sum is σ = 16863864. Its totient is φ = 16533000.

The previous prime is 16698427. The next prime is 16698481. The reversal of 16698431 is 13489661.

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 16698431 - 2² = 16698427 is a prime.

It is a super-2 number, since 2×16698431² = 557675195723522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16698481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82565 + ... + 82766.

It is an arithmetic number, because the mean of its divisors is an integer number (4215966).

Almost surely, 2^16698431 is an apocalyptic number.

16698431 is a deficient number, since it is larger than the sum of its proper divisors (165433).

16698431 is a wasteful number, since it uses less digits than its factorization.

16698431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165432.

The product of its digits is 31104, while the sum is 38.

The square root of 16698431 is about 4086.3713732357. The cubic root of 16698431 is about 255.5986498705.

The spelling of 16698431 in words is "sixteen million, six hundred ninety-eight thousand, four hundred thirty-one".