996609749 has 2 divisors, whose sum is σ = 996609750. Its totient is φ = 996609748.

The previous prime is 996609739. The next prime is 996609787. The reversal of 996609749 is 947906699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 789048100 + 207561649 = 28090^2 + 14407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996609749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996609709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498304874 + 498304875.

It is an arithmetic number, because the mean of its divisors is an integer number (498304875).

Almost surely, 2^996609749 is an apocalyptic number.

It is an amenable number.

996609749 is a deficient number, since it is larger than the sum of its proper divisors (1).

996609749 is an equidigital number, since it uses as much as digits as its factorization.

996609749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 59.

The square root of 996609749 is about 31569.1265162659. The cubic root of 996609749 is about 998.8686368334.

The spelling of 996609749 in words is "nine hundred ninety-six million, six hundred nine thousand, seven hundred forty-nine".