189613507 has 2 divisors, whose sum is σ = 189613508. Its totient is φ = 189613506.

The previous prime is 189613481. The next prime is 189613517. The reversal of 189613507 is 705316981.

189613507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (705316981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189613507 - 2⁷ = 189613379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189613507.

It is not a weakly prime, because it can be changed into another prime (189613517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94806753 + 94806754.

It is an arithmetic number, because the mean of its divisors is an integer number (94806754).

Almost surely, 2^189613507 is an apocalyptic number.

189613507 is a deficient number, since it is larger than the sum of its proper divisors (1).

189613507 is an equidigital number, since it uses as much as digits as its factorization.

189613507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 189613507 is about 13770.0220406505. The cubic root of 189613507 is about 574.4996347776.

The spelling of 189613507 in words is "one hundred eighty-nine million, six hundred thirteen thousand, five hundred seven".