63394669 has 4 divisors (see below), whose sum is σ = 68271196. Its totient is φ = 58518144.

The previous prime is 63394657. The next prime is 63394679. The reversal of 63394669 is 96649336.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9180900 + 54213769 = 3030^2 + 7363^2 .

It is a cyclic number.

It is not a de Polignac number, because 63394669 - 2⁵ = 63394637 is a prime.

It is a super-2 number, since 2×63394669² = 8037768115239122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63394679) 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, 2438244 + ... + 2438269.

It is an arithmetic number, because the mean of its divisors is an integer number (17067799).

Almost surely, 2^63394669 is an apocalyptic number.

It is an amenable number.

63394669 is a deficient number, since it is larger than the sum of its proper divisors (4876527).

63394669 is a wasteful number, since it uses less digits than its factorization.

63394669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4876526.

The product of its digits is 629856, while the sum is 46.

The square root of 63394669 is about 7962.0769275359. The cubic root of 63394669 is about 398.7348967527.

The spelling of 63394669 in words is "sixty-three million, three hundred ninety-four thousand, six hundred sixty-nine".