63720703 has 4 divisors (see below), whose sum is σ = 63790960. Its totient is φ = 63650448.

The previous prime is 63720667. The next prime is 63720719. The reversal of 63720703 is 30702736.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63720703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63720763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33750 + ... + 35587.

It is an arithmetic number, because the mean of its divisors is an integer number (15947740).

Almost surely, 2^63720703 is an apocalyptic number.

63720703 is a deficient number, since it is larger than the sum of its proper divisors (70257).

63720703 is an equidigital number, since it uses as much as digits as its factorization.

63720703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70256.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 63720703 is about 7982.5248511984. The cubic root of 63720703 is about 399.4172827638.

The spelling of 63720703 in words is "sixty-three million, seven hundred twenty thousand, seven hundred three".