999977762893 has 2 divisors, whose sum is σ = 999977762894. Its totient is φ = 999977762892.

The previous prime is 999977762881. The next prime is 999977762929. The reversal of 999977762893 is 398267779999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650647117129 + 349330645764 = 806627^2 + 591042^2 .

It is a cyclic number.

It is not a de Polignac number, because 999977762893 - 2³⁷ = 862538809421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999977762893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999977762293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499988881446 + 499988881447.

It is an arithmetic number, because the mean of its divisors is an integer number (499988881447).

Almost surely, 2^999977762893 is an apocalyptic number.

It is an amenable number.

999977762893 is a deficient number, since it is larger than the sum of its proper divisors (1).

999977762893 is an equidigital number, since it uses as much as digits as its factorization.

999977762893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5833096416, while the sum is 85.

The spelling of 999977762893 in words is "nine hundred ninety-nine billion, nine hundred seventy-seven million, seven hundred sixty-two thousand, eight hundred ninety-three".