16913893 has 2 divisors, whose sum is σ = 16913894. Its totient is φ = 16913892.

The previous prime is 16913863. The next prime is 16913909. The reversal of 16913893 is 39831961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11819844 + 5094049 = 3438^2 + 2257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16913893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16913863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8456946 + 8456947.

It is an arithmetic number, because the mean of its divisors is an integer number (8456947).

Almost surely, 2^16913893 is an apocalyptic number.

It is an amenable number.

16913893 is a deficient number, since it is larger than the sum of its proper divisors (1).

16913893 is an equidigital number, since it uses as much as digits as its factorization.

16913893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 16913893 is about 4112.6503619929. The cubic root of 16913893 is about 256.6932959009.

The spelling of 16913893 in words is "sixteen million, nine hundred thirteen thousand, eight hundred ninety-three".