190293918139 has 4 divisors (see below), whose sum is σ = 204931911856. Its totient is φ = 175655924424.

The previous prime is 190293918127. The next prime is 190293918223. The reversal of 190293918139 is 931819392091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 190293918139 - 2¹³ = 190293909947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190293918139.

It is not an unprimeable number, because it can be changed into a prime (190293918739) 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, 7318996839 + ... + 7318996864.

It is an arithmetic number, because the mean of its divisors is an integer number (51232977964).

Almost surely, 2^190293918139 is an apocalyptic number.

190293918139 is a deficient number, since it is larger than the sum of its proper divisors (14637993717).

190293918139 is a wasteful number, since it uses less digits than its factorization.

190293918139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14637993716.

The product of its (nonzero) digits is 944784, while the sum is 55.

The spelling of 190293918139 in words is "one hundred ninety billion, two hundred ninety-three million, nine hundred eighteen thousand, one hundred thirty-nine".