190540139 has 2 divisors, whose sum is σ = 190540140. Its totient is φ = 190540138.

The previous prime is 190540127. The next prime is 190540169. The reversal of 190540139 is 931045091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190540139 - 2⁴ = 190540123 is a prime.

It is not a weakly prime, because it can be changed into another prime (190540169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95270069 + 95270070.

It is an arithmetic number, because the mean of its divisors is an integer number (95270070).

Almost surely, 2^190540139 is an apocalyptic number.

190540139 is a deficient number, since it is larger than the sum of its proper divisors (1).

190540139 is an equidigital number, since it uses as much as digits as its factorization.

190540139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 190540139 is about 13803.6277478060. The cubic root of 190540139 is about 575.4339650223.

The spelling of 190540139 in words is "one hundred ninety million, five hundred forty thousand, one hundred thirty-nine".