999932958491 has 2 divisors, whose sum is σ = 999932958492. Its totient is φ = 999932958490.

The previous prime is 999932958469. The next prime is 999932958581. The reversal of 999932958491 is 194859239999.

It is a weak prime.

It is an emirp because it is prime and its reverse (194859239999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999932958491 - 2²⁶ = 999865849627 is a prime.

It is not a weakly prime, because it can be changed into another prime (999932958461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499966479245 + 499966479246.

It is an arithmetic number, because the mean of its divisors is an integer number (499966479246).

Almost surely, 2^999932958491 is an apocalyptic number.

999932958491 is a deficient number, since it is larger than the sum of its proper divisors (1).

999932958491 is an equidigital number, since it uses as much as digits as its factorization.

999932958491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510183360, while the sum is 77.

The spelling of 999932958491 in words is "nine hundred ninety-nine billion, nine hundred thirty-two million, nine hundred fifty-eight thousand, four hundred ninety-one".