191023867453 has 2 divisors, whose sum is σ = 191023867454. Its totient is φ = 191023867452.

The previous prime is 191023867387. The next prime is 191023867469. The reversal of 191023867453 is 354768320191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183974082084 + 7049785369 = 428922^2 + 83963^2 .

It is a cyclic number.

It is not a de Polignac number, because 191023867453 - 2⁹ = 191023866941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191023867397 and 191023867406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191023867483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95511933726 + 95511933727.

It is an arithmetic number, because the mean of its divisors is an integer number (95511933727).

It is a 1-persistent number, because it is pandigital, but 2⋅191023867453 = 382047734906 is not.

Almost surely, 2^191023867453 is an apocalyptic number.

It is an amenable number.

191023867453 is a deficient number, since it is larger than the sum of its proper divisors (1).

191023867453 is an equidigital number, since it uses as much as digits as its factorization.

191023867453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 191023867453 in words is "one hundred ninety-one billion, twenty-three million, eight hundred sixty-seven thousand, four hundred fifty-three".