17939113 has 2 divisors, whose sum is σ = 17939114. Its totient is φ = 17939112.

The previous prime is 17939071. The next prime is 17939123. The reversal of 17939113 is 31193971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 1194649 = 4092^2 + 1093^2 .

It is an emirp because it is prime and its reverse (31193971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17939113 - 2⁹ = 17938601 is a prime.

It is not a weakly prime, because it can be changed into another prime (17939123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8969556 + 8969557.

It is an arithmetic number, because the mean of its divisors is an integer number (8969557).

Almost surely, 2^17939113 is an apocalyptic number.

It is an amenable number.

17939113 is a deficient number, since it is larger than the sum of its proper divisors (1).

17939113 is an equidigital number, since it uses as much as digits as its factorization.

17939113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103, while the sum is 34.

The square root of 17939113 is about 4235.4590070027. The cubic root of 17939113 is about 261.7783073094.

The spelling of 17939113 in words is "seventeen million, nine hundred thirty-nine thousand, one hundred thirteen".