199931496823 has 2 divisors, whose sum is σ = 199931496824. Its totient is φ = 199931496822.

The previous prime is 199931496757. The next prime is 199931496841. The reversal of 199931496823 is 328694139991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199931496823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199931496883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99965748411 + 99965748412.

It is an arithmetic number, because the mean of its divisors is an integer number (99965748412).

Almost surely, 2^199931496823 is an apocalyptic number.

199931496823 is a deficient number, since it is larger than the sum of its proper divisors (1).

199931496823 is an equidigital number, since it uses as much as digits as its factorization.

199931496823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22674816, while the sum is 64.

The spelling of 199931496823 in words is "one hundred ninety-nine billion, nine hundred thirty-one million, four hundred ninety-six thousand, eight hundred twenty-three".