190868139 has 24 divisors (see below), whose sum is σ = 343729152. Its totient is φ = 99151920.

The previous prime is 190868123. The next prime is 190868149. The reversal of 190868139 is 931868091.

190868139 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 190868139 - 2⁴ = 190868123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190868094 and 190868103.

It is not an unprimeable number, because it can be changed into a prime (190868149) 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, 137019 + ... + 138404.

It is an arithmetic number, because the mean of its divisors is an integer number (14322048).

Almost surely, 2^190868139 is an apocalyptic number.

190868139 is a deficient number, since it is larger than the sum of its proper divisors (152861013).

190868139 is a wasteful number, since it uses less digits than its factorization.

190868139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275447 (or 275444 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 190868139 is about 13815.5035738839. The cubic root of 190868139 is about 575.7639639808.

It can be divided in two parts, 19086 and 8139, that added together give a square (27225 = 165²).

The spelling of 190868139 in words is "one hundred ninety million, eight hundred sixty-eight thousand, one hundred thirty-nine".