63138773 has 4 divisors (see below), whose sum is σ = 63487788. Its totient is φ = 62789760.

The previous prime is 63138763. The next prime is 63138787. The reversal of 63138773 is 37783136.

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 380689 + 62758084 = 617^2 + 7922^2 .

It is a cyclic number.

It is not a de Polignac number, because 63138773 - 2⁶ = 63138709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63138763) 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, 174236 + ... + 174597.

It is an arithmetic number, because the mean of its divisors is an integer number (15871947).

Almost surely, 2^63138773 is an apocalyptic number.

It is an amenable number.

63138773 is a deficient number, since it is larger than the sum of its proper divisors (349015).

63138773 is a wasteful number, since it uses less digits than its factorization.

63138773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349014.

The product of its digits is 63504, while the sum is 38.

The square root of 63138773 is about 7945.9910017568. The cubic root of 63138773 is about 398.1976682816.

The spelling of 63138773 in words is "sixty-three million, one hundred thirty-eight thousand, seven hundred seventy-three".