999978000433 has 2 divisors, whose sum is σ = 999978000434. Its totient is φ = 999978000432.

The previous prime is 999978000409. The next prime is 999978000521. The reversal of 999978000433 is 334000879999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605452059664 + 394525940769 = 778108^2 + 628113^2 .

It is a cyclic number.

It is not a de Polignac number, because 999978000433 - 2²⁵ = 999944446001 is a prime.

It is not a weakly prime, because it can be changed into another prime (999978000403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499989000216 + 499989000217.

It is an arithmetic number, because the mean of its divisors is an integer number (499989000217).

Almost surely, 2^999978000433 is an apocalyptic number.

It is an amenable number.

999978000433 is a deficient number, since it is larger than the sum of its proper divisors (1).

999978000433 is an equidigital number, since it uses as much as digits as its factorization.

999978000433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 999978000433 in words is "nine hundred ninety-nine billion, nine hundred seventy-eight million, four hundred thirty-three", and thus it is an aban number.