2391758133923 has 2 divisors, whose sum is σ = 2391758133924. Its totient is φ = 2391758133922.

The previous prime is 2391758133889. The next prime is 2391758133979. The reversal of 2391758133923 is 3293318571932.

It is an a-pointer prime, because the next prime (2391758133979) can be obtained adding 2391758133923 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391758133923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2391758136923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195879066961 + 1195879066962.

It is an arithmetic number, because the mean of its divisors is an integer number (1195879066962).

Almost surely, 2^{2391758133923} is an apocalyptic number.

2391758133923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391758133923 is an equidigital number, since it uses as much as digits as its factorization.

2391758133923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The spelling of 2391758133923 in words is "two trillion, three hundred ninety-one billion, seven hundred fifty-eight million, one hundred thirty-three thousand, nine hundred twenty-three".