190309019 has 4 divisors (see below), whose sum is σ = 195452544. Its totient is φ = 185165496.

The previous prime is 190308983. The next prime is 190309037. The reversal of 190309019 is 910903091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190309019 is a prime.

It is a super-2 number, since 2×190309019² = 72435045425484722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190309069) 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 in 3 ways as a sum of consecutive naturals, for example, 2571707 + ... + 2571780.

It is an arithmetic number, because the mean of its divisors is an integer number (48863136).

Almost surely, 2^190309019 is an apocalyptic number.

190309019 is a deficient number, since it is larger than the sum of its proper divisors (5143525).

190309019 is an equidigital number, since it uses as much as digits as its factorization.

190309019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143524.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 190309019 is about 13795.2534953150. The cubic root of 190309019 is about 575.2012089781.

The spelling of 190309019 in words is "one hundred ninety million, three hundred nine thousand, nineteen".