811447023193 has 2 divisors, whose sum is σ = 811447023194. Its totient is φ = 811447023192.

The previous prime is 811447023109. The next prime is 811447023203. The reversal of 811447023193 is 391320744118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811273099849 + 173923344 = 900707^2 + 13188^2 .

It is a cyclic number.

It is not a de Polignac number, because 811447023193 - 2³³ = 802857088601 is a prime.

It is not a weakly prime, because it can be changed into another prime (811447023293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405723511596 + 405723511597.

It is an arithmetic number, because the mean of its divisors is an integer number (405723511597).

Almost surely, 2^811447023193 is an apocalyptic number.

It is an amenable number.

811447023193 is a deficient number, since it is larger than the sum of its proper divisors (1).

811447023193 is an equidigital number, since it uses as much as digits as its factorization.

811447023193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 811447023193 in words is "eight hundred eleven billion, four hundred forty-seven million, twenty-three thousand, one hundred ninety-three".