159172898 has 4 divisors (see below), whose sum is σ = 238759350. Its totient is φ = 79586448.

The previous prime is 159172891. The next prime is 159172957. The reversal of 159172898 is 898271951.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127622209 + 31550689 = 11297^2 + 5617^2 .

It is a super-2 number, since 2×159172898² = 50672022915436808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (159172891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39793223 + ... + 39793226.

Almost surely, 2^159172898 is an apocalyptic number.

159172898 is a deficient number, since it is larger than the sum of its proper divisors (79586452).

159172898 is an equidigital number, since it uses as much as digits as its factorization.

159172898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79586451.

The product of its digits is 362880, while the sum is 50.

The square root of 159172898 is about 12616.3742018062. The cubic root of 159172898 is about 541.9464483249.

The spelling of 159172898 in words is "one hundred fifty-nine million, one hundred seventy-two thousand, eight hundred ninety-eight".