996498781 has 2 divisors, whose sum is σ = 996498782. Its totient is φ = 996498780.

The previous prime is 996498733. The next prime is 996498787. The reversal of 996498781 is 187894699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994834681 + 1664100 = 31541^2 + 1290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996498781 is a prime.

It is a super-2 number, since 2×996498781² = 1986019641068971922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996498787) 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, 498249390 + 498249391.

It is an arithmetic number, because the mean of its divisors is an integer number (498249391).

Almost surely, 2^996498781 is an apocalyptic number.

It is an amenable number.

996498781 is a deficient number, since it is larger than the sum of its proper divisors (1).

996498781 is an equidigital number, since it uses as much as digits as its factorization.

996498781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 61.

The square root of 996498781 is about 31567.3689274225. The cubic root of 996498781 is about 998.8315622850.

The spelling of 996498781 in words is "nine hundred ninety-six million, four hundred ninety-eight thousand, seven hundred eighty-one".