189898745 has 8 divisors (see below), whose sum is σ = 228042240. Its totient is φ = 151809840.

The previous prime is 189898733. The next prime is 189898759. The reversal of 189898745 is 547898981.

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

It is not a de Polignac number, because 189898745 - 2⁴ = 189898729 is a prime.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555 + ... + 20264.

It is an arithmetic number, because the mean of its divisors is an integer number (28505280).

Almost surely, 2^189898745 is an apocalyptic number.

It is an amenable number.

189898745 is a deficient number, since it is larger than the sum of its proper divisors (38143495).

189898745 is a wasteful number, since it uses less digits than its factorization.

189898745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27295.

The product of its digits is 5806080, while the sum is 59.

The square root of 189898745 is about 13780.3753577325. The cubic root of 189898745 is about 574.7875661384.

The spelling of 189898745 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred forty-five".