7920023399 has 2 divisors, whose sum is σ = 7920023400. Its totient is φ = 7920023398.

The previous prime is 7920023311. The next prime is 7920023401. The reversal of 7920023399 is 9933200297.

It is a strong prime.

It is an emirp because it is prime and its reverse (9933200297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7920023399 is a prime.

It is a Sophie Germain prime.

Together with 7920023401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7920023299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960011699 + 3960011700.

It is an arithmetic number, because the mean of its divisors is an integer number (3960011700).

Almost surely, 2^7920023399 is an apocalyptic number.

7920023399 is a deficient number, since it is larger than the sum of its proper divisors (1).

7920023399 is an equidigital number, since it uses as much as digits as its factorization.

7920023399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 7920023399 is about 88994.5133084057. The cubic root of 7920023399 is about 1993.3129498487.

The spelling of 7920023399 in words is "seven billion, nine hundred twenty million, twenty-three thousand, three hundred ninety-nine".