16904081939 has 2 divisors, whose sum is σ = 16904081940. Its totient is φ = 16904081938.

The previous prime is 16904081881. The next prime is 16904081941. The reversal of 16904081939 is 93918040961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16904081939 - 2²⁸ = 16635646483 is a prime.

Together with 16904081941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16904081969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8452040969 + 8452040970.

It is an arithmetic number, because the mean of its divisors is an integer number (8452040970).

Almost surely, 2^16904081939 is an apocalyptic number.

16904081939 is a deficient number, since it is larger than the sum of its proper divisors (1).

16904081939 is an equidigital number, since it uses as much as digits as its factorization.

16904081939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 16904081939 in words is "sixteen billion, nine hundred four million, eighty-one thousand, nine hundred thirty-nine".