63426817 has 8 divisors (see below), whose sum is σ = 64112040. Its totient is φ = 62745600.

The previous prime is 63426761. The next prime is 63426821. The reversal of 63426817 is 71862436.

It can be written as a sum of positive squares in 4 ways, for example, as 57517056 + 5909761 = 7584^2 + 2431^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63426817 is a prime.

It is a super-2 number, since 2×63426817² = 8045922229502978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63426827) 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, 38817 + ... + 40417.

It is an arithmetic number, because the mean of its divisors is an integer number (8014005).

Almost surely, 2^63426817 is an apocalyptic number.

It is an amenable number.

63426817 is a deficient number, since it is larger than the sum of its proper divisors (685223).

63426817 is a wasteful number, since it uses less digits than its factorization.

63426817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its digits is 48384, while the sum is 37.

The square root of 63426817 is about 7964.0954916425. The cubic root of 63426817 is about 398.8022860326.

The spelling of 63426817 in words is "sixty-three million, four hundred twenty-six thousand, eight hundred seventeen".