190879391 has 2 divisors, whose sum is σ = 190879392. Its totient is φ = 190879390.

The previous prime is 190879379. The next prime is 190879427. The reversal of 190879391 is 193978091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190879391 - 2¹⁰ = 190878367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190879321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95439695 + 95439696.

It is an arithmetic number, because the mean of its divisors is an integer number (95439696).

Almost surely, 2^190879391 is an apocalyptic number.

190879391 is a deficient number, since it is larger than the sum of its proper divisors (1).

190879391 is an equidigital number, since it uses as much as digits as its factorization.

190879391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 190879391 is about 13815.9107915475. The cubic root of 190879391 is about 575.7752778454.

The spelling of 190879391 in words is "one hundred ninety million, eight hundred seventy-nine thousand, three hundred ninety-one".