157898189 has 4 divisors (see below), whose sum is σ = 166208640. Its totient is φ = 149587740.

The previous prime is 157898179. The next prime is 157898201. The reversal of 157898189 is 981898751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157898189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157898149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4155197 + ... + 4155234.

It is an arithmetic number, because the mean of its divisors is an integer number (41552160).

Almost surely, 2^157898189 is an apocalyptic number.

157898189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

157898189 is a deficient number, since it is larger than the sum of its proper divisors (8310451).

157898189 is an equidigital number, since it uses as much as digits as its factorization.

157898189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310450.

The product of its digits is 1451520, while the sum is 56.

The square root of 157898189 is about 12565.7546132335. The cubic root of 157898189 is about 540.4958739537.

The spelling of 157898189 in words is "one hundred fifty-seven million, eight hundred ninety-eight thousand, one hundred eighty-nine".