16961939 has 4 divisors (see below), whose sum is σ = 16984656. Its totient is φ = 16939224.

The previous prime is 16961891. The next prime is 16961941. The reversal of 16961939 is 93916961.

It is a happy number.

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 16961939 - 2¹⁶ = 16896403 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 16961939.

It is not an unprimeable number, because it can be changed into a prime (16961999) 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, 10199 + ... + 11744.

It is an arithmetic number, because the mean of its divisors is an integer number (4246164).

Almost surely, 2^16961939 is an apocalyptic number.

16961939 is a deficient number, since it is larger than the sum of its proper divisors (22717).

16961939 is an equidigital number, since it uses as much as digits as its factorization.

16961939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22716.

The product of its digits is 78732, while the sum is 44.

The square root of 16961939 is about 4118.4874650774. The cubic root of 16961939 is about 256.9361224460.

The spelling of 16961939 in words is "sixteen million, nine hundred sixty-one thousand, nine hundred thirty-nine".