189513517 has 2 divisors, whose sum is σ = 189513518. Its totient is φ = 189513516.

The previous prime is 189513503. The next prime is 189513523. The reversal of 189513517 is 715315981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188952516 + 561001 = 13746^2 + 749^2 .

It is an emirp because it is prime and its reverse (715315981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189513517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189513517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189513557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94756758 + 94756759.

It is an arithmetic number, because the mean of its divisors is an integer number (94756759).

Almost surely, 2^189513517 is an apocalyptic number.

It is an amenable number.

189513517 is a deficient number, since it is larger than the sum of its proper divisors (1).

189513517 is an equidigital number, since it uses as much as digits as its factorization.

189513517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 40.

The square root of 189513517 is about 13766.3908487301. The cubic root of 189513517 is about 574.3986322702.

The spelling of 189513517 in words is "one hundred eighty-nine million, five hundred thirteen thousand, five hundred seventeen".