189918071 has 32 divisors (see below), whose sum is σ = 233616000. Its totient is φ = 154103040.

The previous prime is 189918049. The next prime is 189918073. The reversal of 189918071 is 170819981.

It is not a de Polignac number, because 189918071 - 2²² = 185723767 is a prime.

It is a super-2 number, since 2×189918071² = 72137747384722082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189918073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 606611 + ... + 606923.

It is an arithmetic number, because the mean of its divisors is an integer number (7300500).

Almost surely, 2^189918071 is an apocalyptic number.

189918071 is a deficient number, since it is larger than the sum of its proper divisors (43697929).

189918071 is an equidigital number, since it uses as much as digits as its factorization.

189918071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 44.

The square root of 189918071 is about 13781.0765544641. The cubic root of 189918071 is about 574.8070641920.

The spelling of 189918071 in words is "one hundred eighty-nine million, nine hundred eighteen thousand, seventy-one".