190142309 has 8 divisors (see below), whose sum is σ = 220989120. Its totient is φ = 160216416.

The previous prime is 190142279. The next prime is 190142321. The reversal of 190142309 is 903241091.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190142309 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 (190142339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229784 + ... + 230609.

It is an arithmetic number, because the mean of its divisors is an integer number (27623640).

Almost surely, 2^190142309 is an apocalyptic number.

It is an amenable number.

190142309 is a deficient number, since it is larger than the sum of its proper divisors (30846811).

190142309 is an equidigital number, since it uses as much as digits as its factorization.

190142309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460459.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 190142309 is about 13789.2098758413. The cubic root of 190142309 is about 575.0332018635.

The spelling of 190142309 in words is "one hundred ninety million, one hundred forty-two thousand, three hundred nine".