192139531 has 2 divisors, whose sum is σ = 192139532. Its totient is φ = 192139530.

The previous prime is 192139517. The next prime is 192139537. The reversal of 192139531 is 135931291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 192139531 - 2⁹ = 192139019 is a prime.

It is a super-2 number, since 2×192139531² = 73835198745799922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (192139537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96069765 + 96069766.

It is an arithmetic number, because the mean of its divisors is an integer number (96069766).

Almost surely, 2^192139531 is an apocalyptic number.

192139531 is a deficient number, since it is larger than the sum of its proper divisors (1).

192139531 is an equidigital number, since it uses as much as digits as its factorization.

192139531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 34.

The square root of 192139531 is about 13861.4404374149. The cubic root of 192139531 is about 577.0395432592.

The spelling of 192139531 in words is "one hundred ninety-two million, one hundred thirty-nine thousand, five hundred thirty-one".