191436923 has 2 divisors, whose sum is σ = 191436924. Its totient is φ = 191436922.

The previous prime is 191436907. The next prime is 191436929. The reversal of 191436923 is 329634191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191436923 - 2⁴ = 191436907 is a prime.

It is not a weakly prime, because it can be changed into another prime (191436929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95718461 + 95718462.

It is an arithmetic number, because the mean of its divisors is an integer number (95718462).

Almost surely, 2^191436923 is an apocalyptic number.

191436923 is a deficient number, since it is larger than the sum of its proper divisors (1).

191436923 is an equidigital number, since it uses as much as digits as its factorization.

191436923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 38.

The square root of 191436923 is about 13836.0732507457. The cubic root of 191436923 is about 576.3353192793.

The spelling of 191436923 in words is "one hundred ninety-one million, four hundred thirty-six thousand, nine hundred twenty-three".