189156709 has 12 divisors (see below), whose sum is σ = 223142688. Its totient is φ = 159847800.

The previous prime is 189156707. The next prime is 189156743. The reversal of 189156709 is 907651981.

It is a happy number.

189156709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189156709 - 2¹ = 189156707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189156703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23707 + ... + 30664.

It is an arithmetic number, because the mean of its divisors is an integer number (18595224).

Almost surely, 2^189156709 is an apocalyptic number.

It is an amenable number.

189156709 is a deficient number, since it is larger than the sum of its proper divisors (33985979).

189156709 is an equidigital number, since it uses as much as digits as its factorization.

189156709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54456 (or 54449 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 189156709 is about 13753.4253551615. The cubic root of 189156709 is about 574.0379213495.

The spelling of 189156709 in words is "one hundred eighty-nine million, one hundred fifty-six thousand, seven hundred nine".