63247881 has 4 divisors (see below), whose sum is σ = 84330512. Its totient is φ = 42165252.

The previous prime is 63247879. The next prime is 63247889. The reversal of 63247881 is 18874236.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63247881 - 2¹ = 63247879 is a prime.

It is a super-2 number, since 2×63247881² = 8000588901980322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63247889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10541311 + ... + 10541316.

It is an arithmetic number, because the mean of its divisors is an integer number (21082628).

Almost surely, 2^63247881 is an apocalyptic number.

It is an amenable number.

63247881 is a deficient number, since it is larger than the sum of its proper divisors (21082631).

63247881 is a wasteful number, since it uses less digits than its factorization.

63247881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21082630.

The product of its digits is 64512, while the sum is 39.

The square root of 63247881 is about 7952.8536387890. The cubic root of 63247881 is about 398.4269069725.

The spelling of 63247881 in words is "sixty-three million, two hundred forty-seven thousand, eight hundred eighty-one".