63722273 has 8 divisors (see below), whose sum is σ = 67540392. Its totient is φ = 59911936.

The previous prime is 63722207. The next prime is 63722279. The reversal of 63722273 is 37222736.

It can be written as a sum of positive squares in 4 ways, for example, as 5230369 + 58491904 = 2287^2 + 7648^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63722273 - 2⁸ = 63722017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63722279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30911 + ... + 32907.

It is an arithmetic number, because the mean of its divisors is an integer number (8442549).

Almost surely, 2^63722273 is an apocalyptic number.

It is an amenable number.

63722273 is a deficient number, since it is larger than the sum of its proper divisors (3818119).

63722273 is a wasteful number, since it uses less digits than its factorization.

63722273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891.

The product of its digits is 21168, while the sum is 32.

The square root of 63722273 is about 7982.6231904055. The cubic root of 63722273 is about 399.4205631209.

The spelling of 63722273 in words is "sixty-three million, seven hundred twenty-two thousand, two hundred seventy-three".