189707649 has 8 divisors (see below), whose sum is σ = 253254912. Its totient is φ = 126316080.

The previous prime is 189707629. The next prime is 189707659. The reversal of 189707649 is 946707981.

189707649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189707649 - 2⁷ = 189707521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189707629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36049 + ... + 40974.

It is an arithmetic number, because the mean of its divisors is an integer number (31656864).

Almost surely, 2^189707649 is an apocalyptic number.

It is an amenable number.

189707649 is a deficient number, since it is larger than the sum of its proper divisors (63547263).

189707649 is an equidigital number, since it uses as much as digits as its factorization.

189707649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77847.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 189707649 is about 13773.4399842596. The cubic root of 189707649 is about 574.5946976189.

The spelling of 189707649 in words is "one hundred eighty-nine million, seven hundred seven thousand, six hundred forty-nine".