189898149 has 8 divisors (see below), whose sum is σ = 289368640. Its totient is φ = 108513216.

The previous prime is 189898139. The next prime is 189898151. The reversal of 189898149 is 941898981.

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

It is not a de Polignac number, because 189898149 - 2⁴ = 189898133 is a prime.

It is a super-2 number, since 2×189898149² = 72122613987252402, which contains 22 as substring.

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

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 (189898139) 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, 4521364 + ... + 4521405.

It is an arithmetic number, because the mean of its divisors is an integer number (36171080).

Almost surely, 2^189898149 is an apocalyptic number.

It is an amenable number.

189898149 is a deficient number, since it is larger than the sum of its proper divisors (99470491).

189898149 is an equidigital number, since it uses as much as digits as its factorization.

189898149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042779.

The product of its digits is 1492992, while the sum is 57.

The square root of 189898149 is about 13780.3537327603. The cubic root of 189898149 is about 574.7869648114.

The spelling of 189898149 in words is "one hundred eighty-nine million, eight hundred ninety-eight thousand, one hundred forty-nine".