189856149 has 32 divisors (see below), whose sum is σ = 293529600. Its totient is φ = 106920000.

The previous prime is 189856133. The next prime is 189856181. The reversal of 189856149 is 941658981.

It is not a de Polignac number, because 189856149 - 2⁴ = 189856133 is a prime.

It is a super-2 number, since 2×189856149² = 72090714626220402, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189856129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756274 + ... + 756524.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^189856149 is an apocalyptic number.

It is an amenable number.

189856149 is a deficient number, since it is larger than the sum of its proper divisors (103673451).

189856149 is a wasteful number, since it uses less digits than its factorization.

189856149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its digits is 622080, while the sum is 51.

The square root of 189856149 is about 13778.8297398582. The cubic root of 189856149 is about 574.7445862475.

The spelling of 189856149 in words is "one hundred eighty-nine million, eight hundred fifty-six thousand, one hundred forty-nine".