63821123 has 4 divisors (see below), whose sum is σ = 63896280. Its totient is φ = 63745968.

The previous prime is 63821101. The next prime is 63821137. The reversal of 63821123 is 32112836.

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

It is a cyclic number.

It is not a de Polignac number, because 63821123 - 2⁶ = 63821059 is a prime.

It is a super-2 number, since 2×63821123² = 8146271481962258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63821092 and 63821101.

It is not an unprimeable number, because it can be changed into a prime (63821423) 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, 36290 + ... + 38007.

It is an arithmetic number, because the mean of its divisors is an integer number (15974070).

Almost surely, 2^63821123 is an apocalyptic number.

63821123 is a deficient number, since it is larger than the sum of its proper divisors (75157).

63821123 is an equidigital number, since it uses as much as digits as its factorization.

63821123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75156.

The product of its digits is 1728, while the sum is 26.

The square root of 63821123 is about 7988.8123648012. The cubic root of 63821123 is about 399.6269918538.

Adding to 63821123 its reverse (32112836), we get a palindrome (95933959).

The spelling of 63821123 in words is "sixty-three million, eight hundred twenty-one thousand, one hundred twenty-three".