7723631813 has 2 divisors, whose sum is σ = 7723631814. Its totient is φ = 7723631812.

The previous prime is 7723631791. The next prime is 7723631869. The reversal of 7723631813 is 3181363277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4585727524 + 3137904289 = 67718^2 + 56017^2 .

It is a cyclic number.

It is not a de Polignac number, because 7723631813 - 2⁸ = 7723631557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7723639813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3861815906 + 3861815907.

It is an arithmetic number, because the mean of its divisors is an integer number (3861815907).

Almost surely, 2^7723631813 is an apocalyptic number.

It is an amenable number.

7723631813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7723631813 is an equidigital number, since it uses as much as digits as its factorization.

7723631813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 7723631813 is about 87884.1954676721. The cubic root of 7723631813 is about 1976.6989014128.

The spelling of 7723631813 in words is "seven billion, seven hundred twenty-three million, six hundred thirty-one thousand, eight hundred thirteen".