189973135 has 16 divisors (see below), whose sum is σ = 249524352. Its totient is φ = 137700000.

The previous prime is 189973129. The next prime is 189973219. The reversal of 189973135 is 531379981.

It is a happy number.

189973135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189973135 - 2³ = 189973127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11260 + ... + 22510.

It is an arithmetic number, because the mean of its divisors is an integer number (15595272).

Almost surely, 2^189973135 is an apocalyptic number.

189973135 is a deficient number, since it is larger than the sum of its proper divisors (59551217).

189973135 is a wasteful number, since it uses less digits than its factorization.

189973135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11574.

The product of its digits is 204120, while the sum is 46.

The square root of 189973135 is about 13783.0742216677. The cubic root of 189973135 is about 574.8626111577.

It can be divided in two parts, 18997 and 3135, that multiplied together give a palindrome (59555595).

The spelling of 189973135 in words is "one hundred eighty-nine million, nine hundred seventy-three thousand, one hundred thirty-five".