16990235 has 4 divisors (see below), whose sum is σ = 20388288. Its totient is φ = 13592184.

The previous prime is 16990223. The next prime is 16990279. The reversal of 16990235 is 53209961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53209961 = 7 ⋅7601423.

It is a cyclic number.

It is not a de Polignac number, because 16990235 - 2⁴ = 16990219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16990195 and 16990204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1699019 + ... + 1699028.

It is an arithmetic number, because the mean of its divisors is an integer number (5097072).

Almost surely, 2^16990235 is an apocalyptic number.

16990235 is a deficient number, since it is larger than the sum of its proper divisors (3398053).

16990235 is an equidigital number, since it uses as much as digits as its factorization.

16990235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398052.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 16990235 is about 4121.9212753278. The cubic root of 16990235 is about 257.0789171564.

The spelling of 16990235 in words is "sixteen million, nine hundred ninety thousand, two hundred thirty-five".