763078721 has 2 divisors, whose sum is σ = 763078722. Its totient is φ = 763078720.

The previous prime is 763078669. The next prime is 763078747. The reversal of 763078721 is 127870367.

763078721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587383696 + 175695025 = 24236^2 + 13255^2 .

It is a cyclic number.

It is not a de Polignac number, because 763078721 - 2¹⁸ = 762816577 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (763078781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381539360 + 381539361.

It is an arithmetic number, because the mean of its divisors is an integer number (381539361).

Almost surely, 2^763078721 is an apocalyptic number.

It is an amenable number.

763078721 is a deficient number, since it is larger than the sum of its proper divisors (1).

763078721 is an equidigital number, since it uses as much as digits as its factorization.

763078721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 763078721 is about 27623.8795428883. The cubic root of 763078721 is about 913.8111391499.

The spelling of 763078721 in words is "seven hundred sixty-three million, seventy-eight thousand, seven hundred twenty-one".