7923737813 has 2 divisors, whose sum is σ = 7923737814. Its totient is φ = 7923737812.

The previous prime is 7923737803. The next prime is 7923737863. The reversal of 7923737813 is 3187373297.

It is an a-pointer prime, because the next prime (7923737863) can be obtained adding 7923737813 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6597175729 + 1326562084 = 81223^2 + 36422^2 .

It is a cyclic number.

It is not a de Polignac number, because 7923737813 - 2²⁸ = 7655302357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7923737803) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961868906 + 3961868907.

It is an arithmetic number, because the mean of its divisors is an integer number (3961868907).

Almost surely, 2^7923737813 is an apocalyptic number.

It is an amenable number.

7923737813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7923737813 is an equidigital number, since it uses as much as digits as its factorization.

7923737813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 7923737813 is about 89015.3796430707. The cubic root of 7923737813 is about 1993.6245159468.

The spelling of 7923737813 in words is "seven billion, nine hundred twenty-three million, seven hundred thirty-seven thousand, eight hundred thirteen".