999823142951 has 2 divisors, whose sum is σ = 999823142952. Its totient is φ = 999823142950.

The previous prime is 999823142917. The next prime is 999823142999. The reversal of 999823142951 is 159241328999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999823142951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999823142651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499911571475 + 499911571476.

It is an arithmetic number, because the mean of its divisors is an integer number (499911571476).

Almost surely, 2^999823142951 is an apocalyptic number.

999823142951 is a deficient number, since it is larger than the sum of its proper divisors (1).

999823142951 is an equidigital number, since it uses as much as digits as its factorization.

999823142951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 62.

The spelling of 999823142951 in words is "nine hundred ninety-nine billion, eight hundred twenty-three million, one hundred forty-two thousand, nine hundred fifty-one".