64720503 has 6 divisors (see below), whose sum is σ = 93485184. Its totient is φ = 43146996.

The previous prime is 64720471. The next prime is 64720531. The reversal of 64720503 is 30502746.

It is a happy number.

It is not a de Polignac number, because 64720503 - 2⁵ = 64720471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64720543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3595575 + ... + 3595592.

It is an arithmetic number, because the mean of its divisors is an integer number (15580864).

Almost surely, 2^64720503 is an apocalyptic number.

64720503 is a deficient number, since it is larger than the sum of its proper divisors (28764681).

64720503 is a wasteful number, since it uses less digits than its factorization.

64720503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191173 (or 7191170 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 64720503 is about 8044.9054065290. The cubic root of 64720503 is about 401.4954500223.

The spelling of 64720503 in words is "sixty-four million, seven hundred twenty thousand, five hundred three".