63247723081 has 3 divisors (see below), whose sum is σ = 63247974573. Its totient is φ = 63247471590.

The previous prime is 63247722983. The next prime is 63247723093. The reversal of 63247723081 is 18032774236.

The square root of 63247723081 is 251491.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 63247723081 - 2¹⁹ = 63247198793 is a prime.

It is a super-2 number, since 2×63247723081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63247723381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 125746 + ... + 377236.

It is an arithmetic number, because the mean of its divisors is an integer number (21082658191).

Almost surely, 2^63247723081 is an apocalyptic number.

63247723081 is the 251491-st square number.

63247723081 is the 125746-th centered octagonal number.

It is an amenable number.

63247723081 is a deficient number, since it is larger than the sum of its proper divisors (251492).

63247723081 is an frugal number, since it uses more digits than its factorization.

63247723081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502982 (or 251491 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 63247723081 in words is "sixty-three billion, two hundred forty-seven million, seven hundred twenty-three thousand, eighty-one".