189743507 has 4 divisors (see below), whose sum is σ = 189798840. Its totient is φ = 189688176.

The previous prime is 189743503. The next prime is 189743527. The reversal of 189743507 is 705347981.

189743507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189743507 - 2² = 189743503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189743503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22157 + ... + 29502.

It is an arithmetic number, because the mean of its divisors is an integer number (47449710).

Almost surely, 2^189743507 is an apocalyptic number.

189743507 is a deficient number, since it is larger than the sum of its proper divisors (55333).

189743507 is an equidigital number, since it uses as much as digits as its factorization.

189743507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55332.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 189743507 is about 13774.7416309708. The cubic root of 189743507 is about 574.6308980898.

The spelling of 189743507 in words is "one hundred eighty-nine million, seven hundred forty-three thousand, five hundred seven".