189916898 has 4 divisors (see below), whose sum is σ = 284875350. Its totient is φ = 94958448.

The previous prime is 189916823. The next prime is 189916907. The reversal of 189916898 is 898619981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 898619981 = 7 ⋅128374283.

It can be written as a sum of positive squares in only one way, i.e., 98465929 + 91450969 = 9923^2 + 9563^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47479223 + ... + 47479226.

Almost surely, 2^189916898 is an apocalyptic number.

189916898 is a deficient number, since it is larger than the sum of its proper divisors (94958452).

189916898 is an equidigital number, since it uses as much as digits as its factorization.

189916898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94958451.

The product of its digits is 2239488, while the sum is 59.

The square root of 189916898 is about 13781.0339960396. The cubic root of 189916898 is about 574.8058807868.

The spelling of 189916898 in words is "one hundred eighty-nine million, nine hundred sixteen thousand, eight hundred ninety-eight".