64670503 has 4 divisors (see below), whose sum is σ = 67482288. Its totient is φ = 61858720.

The previous prime is 64670497. The next prime is 64670513. The reversal of 64670503 is 30507646.

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

It is a cyclic number.

It is not a de Polignac number, because 64670503 - 2⁹ = 64669991 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64670513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405858 + ... + 1405903.

It is an arithmetic number, because the mean of its divisors is an integer number (16870572).

Almost surely, 2^64670503 is an apocalyptic number.

64670503 is a deficient number, since it is larger than the sum of its proper divisors (2811785).

64670503 is a wasteful number, since it uses less digits than its factorization.

64670503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811784.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 64670503 is about 8041.7972493716. The cubic root of 64670503 is about 401.3920312529.

The spelling of 64670503 in words is "sixty-four million, six hundred seventy thousand, five hundred three".