63826013 has 8 divisors (see below), whose sum is σ = 66130680. Its totient is φ = 61601568.

The previous prime is 63825961. The next prime is 63826019. The reversal of 63826013 is 31062836.

It can be written as a sum of positive squares in 4 ways, for example, as 7546009 + 56280004 = 2747^2 + 7502^2 .

It is not a de Polignac number, because 63826013 - 2¹² = 63821917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63826019) 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, 23081 + ... + 25697.

It is an arithmetic number, because the mean of its divisors is an integer number (8266335).

Almost surely, 2^63826013 is an apocalyptic number.

It is an amenable number.

63826013 is a deficient number, since it is larger than the sum of its proper divisors (2304667).

63826013 is an frugal number, since it uses more digits than its factorization.

63826013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704 (or 2646 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 63826013 is about 7989.1184119401. The cubic root of 63826013 is about 399.6371981198.

Adding to 63826013 its reverse (31062836), we get a palindrome (94888849).

The spelling of 63826013 in words is "sixty-three million, eight hundred twenty-six thousand, thirteen".