192739139 has 2 divisors, whose sum is σ = 192739140. Its totient is φ = 192739138.

The previous prime is 192739091. The next prime is 192739147. The reversal of 192739139 is 931937291.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-192739139 is a prime.

It is a super-2 number, since 2×192739139² = 74296751404922642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 192739139.

It is not a weakly prime, because it can be changed into another prime (192739159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96369569 + 96369570.

It is an arithmetic number, because the mean of its divisors is an integer number (96369570).

Almost surely, 2^192739139 is an apocalyptic number.

192739139 is a deficient number, since it is larger than the sum of its proper divisors (1).

192739139 is an equidigital number, since it uses as much as digits as its factorization.

192739139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 192739139 is about 13883.0522220440. The cubic root of 192739139 is about 577.6391738684.

The spelling of 192739139 in words is "one hundred ninety-two million, seven hundred thirty-nine thousand, one hundred thirty-nine".