189956649 has 8 divisors (see below), whose sum is σ = 259453152. Its totient is φ = 123548960.

The previous prime is 189956647. The next prime is 189956707. The reversal of 189956649 is 946659981.

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

It is a cyclic number.

It is not a de Polignac number, because 189956649 - 2¹ = 189956647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189956647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772059 + ... + 772304.

It is an arithmetic number, because the mean of its divisors is an integer number (32431644).

Almost surely, 2^189956649 is an apocalyptic number.

It is an amenable number.

189956649 is a deficient number, since it is larger than the sum of its proper divisors (69496503).

189956649 is a wasteful number, since it uses less digits than its factorization.

189956649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544407.

The product of its digits is 4199040, while the sum is 57.

The square root of 189956649 is about 13782.4761563371. The cubic root of 189956649 is about 574.8459816850.

The spelling of 189956649 in words is "one hundred eighty-nine million, nine hundred fifty-six thousand, six hundred forty-nine".