990000761 has 2 divisors, whose sum is σ = 990000762. Its totient is φ = 990000760.

The previous prime is 990000743. The next prime is 990000787. The reversal of 990000761 is 167000099.

990000761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653058025 + 336942736 = 25555^2 + 18356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990000761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (990000731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495000380 + 495000381.

It is an arithmetic number, because the mean of its divisors is an integer number (495000381).

Almost surely, 2^990000761 is an apocalyptic number.

It is an amenable number.

990000761 is a deficient number, since it is larger than the sum of its proper divisors (1).

990000761 is an equidigital number, since it uses as much as digits as its factorization.

990000761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 990000761 is about 31464.2775381861. The cubic root of 990000761 is about 996.6557487845.

The spelling of 990000761 in words is "nine hundred ninety million, seven hundred sixty-one", and thus it is an aban number.