16990898 has 4 divisors (see below), whose sum is σ = 25486350. Its totient is φ = 8495448.

The previous prime is 16990889. The next prime is 16990913. The reversal of 16990898 is 89809961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89809961 = 691 ⋅129971.

It can be written as a sum of positive squares in only one way, i.e., 16949689 + 41209 = 4117^2 + 203^2 .

It is a super-2 number, since 2×16990898² = 577381229692808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4247723 + ... + 4247726.

Almost surely, 2^16990898 is an apocalyptic number.

16990898 is a deficient number, since it is larger than the sum of its proper divisors (8495452).

16990898 is an equidigital number, since it uses as much as digits as its factorization.

16990898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8495451.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 16990898 is about 4122.0016982044. The cubic root of 16990898 is about 257.0822610596.

The spelling of 16990898 in words is "sixteen million, nine hundred ninety thousand, eight hundred ninety-eight".