190246809 has 4 divisors (see below), whose sum is σ = 253662416. Its totient is φ = 126831204.

The previous prime is 190246799. The next prime is 190246817. The reversal of 190246809 is 908642091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-190246809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190242809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31707799 + ... + 31707804.

It is an arithmetic number, because the mean of its divisors is an integer number (63415604).

Almost surely, 2^190246809 is an apocalyptic number.

It is an amenable number.

190246809 is a deficient number, since it is larger than the sum of its proper divisors (63415607).

190246809 is an equidigital number, since it uses as much as digits as its factorization.

190246809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63415606.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 190246809 is about 13792.9985499890. The cubic root of 190246809 is about 575.1385264225.

The spelling of 190246809 in words is "one hundred ninety million, two hundred forty-six thousand, eight hundred nine".