63308813 has 4 divisors (see below), whose sum is σ = 65019900. Its totient is φ = 61597728.

The previous prime is 63308767. The next prime is 63308849. The reversal of 63308813 is 31880336.

It is a happy number.

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 44063044 + 19245769 = 6638^2 + 4387^2 .

It is a cyclic number.

It is not a de Polignac number, because 63308813 - 2¹⁶ = 63243277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63308813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63308863) 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, 855488 + ... + 855561.

It is an arithmetic number, because the mean of its divisors is an integer number (16254975).

Almost surely, 2^63308813 is an apocalyptic number.

It is an amenable number.

63308813 is a deficient number, since it is larger than the sum of its proper divisors (1711087).

63308813 is a wasteful number, since it uses less digits than its factorization.

63308813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711086.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 63308813 is about 7956.6835427834. The cubic root of 63308813 is about 398.5548119504.

The spelling of 63308813 in words is "sixty-three million, three hundred eight thousand, eight hundred thirteen".