189938107 has 4 divisors (see below), whose sum is σ = 189990976. Its totient is φ = 189885240.

The previous prime is 189938087. The next prime is 189938143. The reversal of 189938107 is 701839981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 701839981 = 6121 ⋅114661.

It is a cyclic number.

It is not a de Polignac number, because 189938107 - 2²³ = 181549499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189938207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20619 + ... + 28372.

It is an arithmetic number, because the mean of its divisors is an integer number (47497744).

Almost surely, 2^189938107 is an apocalyptic number.

189938107 is a deficient number, since it is larger than the sum of its proper divisors (52869).

189938107 is an equidigital number, since it uses as much as digits as its factorization.

189938107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52868.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 189938107 is about 13781.8034741466. The cubic root of 189938107 is about 574.8272771699.

The spelling of 189938107 in words is "one hundred eighty-nine million, nine hundred thirty-eight thousand, one hundred seven".