190232391 has 4 divisors (see below), whose sum is σ = 253643192. Its totient is φ = 126821592.

The previous prime is 190232369. The next prime is 190232401. The reversal of 190232391 is 193232091.

It is a happy number.

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

It is not a de Polignac number, because 190232391 - 2⁹ = 190231879 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 (190232311) 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, 31705396 + ... + 31705401.

It is an arithmetic number, because the mean of its divisors is an integer number (63410798).

Almost surely, 2^190232391 is an apocalyptic number.

190232391 is a deficient number, since it is larger than the sum of its proper divisors (63410801).

190232391 is an equidigital number, since it uses as much as digits as its factorization.

190232391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63410800.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 190232391 is about 13792.4758836113. The cubic root of 190232391 is about 575.1239969510.

The spelling of 190232391 in words is "one hundred ninety million, two hundred thirty-two thousand, three hundred ninety-one".