16994137 has 4 divisors (see below), whose sum is σ = 17453476. Its totient is φ = 16534800.

The previous prime is 16994123. The next prime is 16994141. The reversal of 16994137 is 73149961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73149961 = 179 ⋅408659.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 2886601 = 3756^2 + 1699^2 .

It is a cyclic number.

It is not a de Polignac number, because 16994137 - 2⁷ = 16994009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16994137.

It is not an unprimeable number, because it can be changed into a prime (16994147) 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, 229614 + ... + 229687.

It is an arithmetic number, because the mean of its divisors is an integer number (4363369).

Almost surely, 2^16994137 is an apocalyptic number.

It is an amenable number.

16994137 is a deficient number, since it is larger than the sum of its proper divisors (459339).

16994137 is an equidigital number, since it uses as much as digits as its factorization.

16994137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459338.

The product of its digits is 40824, while the sum is 40.

The square root of 16994137 is about 4122.3945711200. The cubic root of 16994137 is about 257.0985960121.

The spelling of 16994137 in words is "sixteen million, nine hundred ninety-four thousand, one hundred thirty-seven".