191023793 has 2 divisors, whose sum is σ = 191023794. Its totient is φ = 191023792.

The previous prime is 191023787. The next prime is 191023813. The reversal of 191023793 is 397320191.

191023793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145636624 + 45387169 = 12068^2 + 6737^2 .

It is a cyclic number.

It is not a de Polignac number, because 191023793 - 2⁸ = 191023537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191020793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95511896 + 95511897.

It is an arithmetic number, because the mean of its divisors is an integer number (95511897).

Almost surely, 2^191023793 is an apocalyptic number.

It is an amenable number.

191023793 is a deficient number, since it is larger than the sum of its proper divisors (1).

191023793 is an equidigital number, since it uses as much as digits as its factorization.

191023793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 191023793 is about 13821.1357348085. The cubic root of 191023793 is about 575.9204343303.

The spelling of 191023793 in words is "one hundred ninety-one million, twenty-three thousand, seven hundred ninety-three".