190139731 has 2 divisors, whose sum is σ = 190139732. Its totient is φ = 190139730.

The previous prime is 190139693. The next prime is 190139743. The reversal of 190139731 is 137931091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190139731 - 2⁹ = 190139219 is a prime.

It is a super-2 number, since 2×190139731² = 72306234609504722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190139791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95069865 + 95069866.

It is an arithmetic number, because the mean of its divisors is an integer number (95069866).

Almost surely, 2^190139731 is an apocalyptic number.

190139731 is a deficient number, since it is larger than the sum of its proper divisors (1).

190139731 is an equidigital number, since it uses as much as digits as its factorization.

190139731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 190139731 is about 13789.1163966369. The cubic root of 190139731 is about 575.0306030341.

The spelling of 190139731 in words is "one hundred ninety million, one hundred thirty-nine thousand, seven hundred thirty-one".