190242109 has 6 divisors (see below), whose sum is σ = 190915706. Its totient is φ = 189570240.

The previous prime is 190242089. The next prime is 190242113. The reversal of 190242109 is 901242091.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 37027225 + 153214884 = 6085^2 + 12378^2 .

It is not a de Polignac number, because 190242109 - 2⁵ = 190242077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190242119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320517 + ... + 321109.

Almost surely, 2^190242109 is an apocalyptic number.

It is an amenable number.

190242109 is a deficient number, since it is larger than the sum of its proper divisors (673597).

190242109 is an frugal number, since it uses more digits than its factorization.

190242109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 190242109 is about 13792.8281726410. The cubic root of 190242109 is about 575.1337901655.

The spelling of 190242109 in words is "one hundred ninety million, two hundred forty-two thousand, one hundred nine".