199315822957 has 2 divisors, whose sum is σ = 199315822958. Its totient is φ = 199315822956.

The previous prime is 199315822913. The next prime is 199315822961. The reversal of 199315822957 is 759228513991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143606134116 + 55709688841 = 378954^2 + 236029^2 .

It is a cyclic number.

It is not a de Polignac number, because 199315822957 - 2²³ = 199307434349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199315822895 and 199315822904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199315822997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99657911478 + 99657911479.

It is an arithmetic number, because the mean of its divisors is an integer number (99657911479).

Almost surely, 2^199315822957 is an apocalyptic number.

It is an amenable number.

199315822957 is a deficient number, since it is larger than the sum of its proper divisors (1).

199315822957 is an equidigital number, since it uses as much as digits as its factorization.

199315822957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 61.

The spelling of 199315822957 in words is "one hundred ninety-nine billion, three hundred fifteen million, eight hundred twenty-two thousand, nine hundred fifty-seven".