190342809 has 24 divisors (see below), whose sum is σ = 283745280. Its totient is φ = 122888448.

The previous prime is 190342807. The next prime is 190342813. The reversal of 190342809 is 908243091.

190342809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190342809 - 2¹ = 190342807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190342807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38712 + ... + 43350.

It is an arithmetic number, because the mean of its divisors is an integer number (11822720).

Almost surely, 2^190342809 is an apocalyptic number.

It is an amenable number.

190342809 is a deficient number, since it is larger than the sum of its proper divisors (93402471).

190342809 is a wasteful number, since it uses less digits than its factorization.

190342809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789 (or 4786 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 190342809 is about 13796.4781375538. The cubic root of 190342809 is about 575.2352499268.

The spelling of 190342809 in words is "one hundred ninety million, three hundred forty-two thousand, eight hundred nine".