191125998 has 48 divisors (see below), whose sum is σ = 493848576. Its totient is φ = 52232400.

The previous prime is 191125967. The next prime is 191125999. The reversal of 191125998 is 899521191.

It is a super-2 number, since 2×191125998² = 73058294222992008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191125999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30078 + ... + 35873.

It is an arithmetic number, because the mean of its divisors is an integer number (10288512).

Almost surely, 2^191125998 is an apocalyptic number.

191125998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

191125998 is an abundant number, since it is smaller than the sum of its proper divisors (302722578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191125998 is a wasteful number, since it uses less digits than its factorization.

191125998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65989 (or 65986 counting only the distinct ones).

The product of its digits is 58320, while the sum is 45.

The square root of 191125998 is about 13824.8326572151. The cubic root of 191125998 is about 576.0231291349.

The spelling of 191125998 in words is "one hundred ninety-one million, one hundred twenty-five thousand, nine hundred ninety-eight".