189951795 has 48 divisors (see below), whose sum is σ = 380326752. Its totient is φ = 86676480.

The previous prime is 189951791. The next prime is 189951799. The reversal of 189951795 is 597159981.

It is an interprime number because it is at equal distance from previous prime (189951791) and next prime (189951799).

It is not a de Polignac number, because 189951795 - 2² = 189951791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189951791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2872 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (7923474).

Almost surely, 2^189951795 is an apocalyptic number.

189951795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189951795 is an abundant number, since it is smaller than the sum of its proper divisors (190374957).

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

189951795 is a wasteful number, since it uses less digits than its factorization.

189951795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22612 (or 22609 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 54.

The square root of 189951795 is about 13782.3000620361. The cubic root of 189951795 is about 574.8410852588.

The spelling of 189951795 in words is "one hundred eighty-nine million, nine hundred fifty-one thousand, seven hundred ninety-five".