189512709 has 16 divisors (see below), whose sum is σ = 272764800. Its totient is φ = 116680256.

The previous prime is 189512699. The next prime is 189512749. The reversal of 189512709 is 907215981.

189512709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189512709 - 2¹¹ = 189510661 is a prime.

It is a house number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189512749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45354 + ... + 49355.

It is an arithmetic number, because the mean of its divisors is an integer number (17047800).

Almost surely, 2^189512709 is an apocalyptic number.

It is an amenable number.

189512709 is a deficient number, since it is larger than the sum of its proper divisors (83252091).

189512709 is a wasteful number, since it uses less digits than its factorization.

189512709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94764.

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 189512709 is about 13766.3615018639. The cubic root of 189512709 is about 574.3978159437.

The spelling of 189512709 in words is "one hundred eighty-nine million, five hundred twelve thousand, seven hundred nine".