63332981 has 4 divisors (see below), whose sum is σ = 63407232. Its totient is φ = 63258732.

The previous prime is 63332963. The next prime is 63332989. The reversal of 63332981 is 18923336.

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 a cyclic number.

It is not a de Polignac number, because 63332981 - 2⁶ = 63332917 is a prime.

It is a super-2 number, since 2×63332981² = 8022132964692722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63332989) 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, 35831 + ... + 37556.

It is an arithmetic number, because the mean of its divisors is an integer number (15851808).

Almost surely, 2^63332981 is an apocalyptic number.

It is an amenable number.

63332981 is a deficient number, since it is larger than the sum of its proper divisors (74251).

63332981 is an equidigital number, since it uses as much as digits as its factorization.

63332981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74250.

The product of its digits is 23328, while the sum is 35.

The square root of 63332981 is about 7958.2021210824. The cubic root of 63332981 is about 398.6055213056.

The spelling of 63332981 in words is "sixty-three million, three hundred thirty-two thousand, nine hundred eighty-one".