190919291 has 2 divisors, whose sum is σ = 190919292. Its totient is φ = 190919290.

The previous prime is 190919257. The next prime is 190919293. The reversal of 190919291 is 192919091.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190919291 - 2²² = 186724987 is a prime.

Together with 190919293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (190919293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95459645 + 95459646.

It is an arithmetic number, because the mean of its divisors is an integer number (95459646).

Almost surely, 2^190919291 is an apocalyptic number.

190919291 is a deficient number, since it is larger than the sum of its proper divisors (1).

190919291 is an equidigital number, since it uses as much as digits as its factorization.

190919291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 41.

The square root of 190919291 is about 13817.3547034156. The cubic root of 190919291 is about 575.8153936360.

It can be divided in two parts, 19091 and 9291, that added together give a palindrome (28382).

The spelling of 190919291 in words is "one hundred ninety million, nine hundred nineteen thousand, two hundred ninety-one".