191140919 has 2 divisors, whose sum is σ = 191140920. Its totient is φ = 191140918.

The previous prime is 191140897. The next prime is 191140933. The reversal of 191140919 is 919041191.

It is a happy number.

191140919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191140919 - 2¹² = 191136823 is a prime.

It is a super-2 number, since 2×191140919² = 73069701832329122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191140519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95570459 + 95570460.

It is an arithmetic number, because the mean of its divisors is an integer number (95570460).

Almost surely, 2^191140919 is an apocalyptic number.

191140919 is a deficient number, since it is larger than the sum of its proper divisors (1).

191140919 is an equidigital number, since it uses as much as digits as its factorization.

191140919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 35.

The square root of 191140919 is about 13825.3722915515. The cubic root of 191140919 is about 576.0381185791.

The spelling of 191140919 in words is "one hundred ninety-one million, one hundred forty thousand, nine hundred nineteen".