189000749 has 8 divisors (see below), whose sum is σ = 217913280. Its totient is φ = 160566336.

The previous prime is 189000739. The next prime is 189000787. The reversal of 189000749 is 947000981.

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

It is not a de Polignac number, because 189000749 - 2²⁰ = 187952173 is a prime.

It is a super-2 number, since 2×189000749² = 71442566245122002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189000719) 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, 118679 + ... + 120260.

It is an arithmetic number, because the mean of its divisors is an integer number (27239160).

Almost surely, 2^189000749 is an apocalyptic number.

It is an amenable number.

189000749 is a deficient number, since it is larger than the sum of its proper divisors (28912531).

189000749 is a wasteful number, since it uses less digits than its factorization.

189000749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239059.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 189000749 is about 13747.7543257072. The cubic root of 189000749 is about 573.8801129183.

The spelling of 189000749 in words is "one hundred eighty-nine million, seven hundred forty-nine", and thus it is an aban number.