190139693 has 2 divisors, whose sum is σ = 190139694. Its totient is φ = 190139692.

The previous prime is 190139681. The next prime is 190139731. The reversal of 190139693 is 396931091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187087684 + 3052009 = 13678^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 190139693 - 2¹⁸ = 189877549 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190139693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190139993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95069846 + 95069847.

It is an arithmetic number, because the mean of its divisors is an integer number (95069847).

Almost surely, 2^190139693 is an apocalyptic number.

It is an amenable number.

190139693 is a deficient number, since it is larger than the sum of its proper divisors (1).

190139693 is an equidigital number, since it uses as much as digits as its factorization.

190139693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 190139693 is about 13789.1150187385. The cubic root of 190139693 is about 575.0305647269.

The spelling of 190139693 in words is "one hundred ninety million, one hundred thirty-nine thousand, six hundred ninety-three".