63720793 has 2 divisors, whose sum is σ = 63720794. Its totient is φ = 63720792.

The previous prime is 63720791. The next prime is 63720809. The reversal of 63720793 is 39702736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34257609 + 29463184 = 5853^2 + 5428^2 .

It is a cyclic number.

It is not a de Polignac number, because 63720793 - 2¹ = 63720791 is a prime.

Together with 63720791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63720791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31860396 + 31860397.

It is an arithmetic number, because the mean of its divisors is an integer number (31860397).

Almost surely, 2^63720793 is an apocalyptic number.

It is an amenable number.

63720793 is a deficient number, since it is larger than the sum of its proper divisors (1).

63720793 is an equidigital number, since it uses as much as digits as its factorization.

63720793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 63720793 is about 7982.5304885105. The cubic root of 63720793 is about 399.4174708112.

The spelling of 63720793 in words is "sixty-three million, seven hundred twenty thousand, seven hundred ninety-three".