63236981 has 4 divisors (see below), whose sum is σ = 63333600. Its totient is φ = 63140364.

The previous prime is 63236977. The next prime is 63236989. The reversal of 63236981 is 18963236.

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 63236981 - 2² = 63236977 is a prime.

It is a super-2 number, since 2×63236981² = 7997831531988722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63236989) 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, 47321 + ... + 48638.

It is an arithmetic number, because the mean of its divisors is an integer number (15833400).

Almost surely, 2^63236981 is an apocalyptic number.

It is an amenable number.

63236981 is a deficient number, since it is larger than the sum of its proper divisors (96619).

63236981 is an equidigital number, since it uses as much as digits as its factorization.

63236981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96618.

The product of its digits is 46656, while the sum is 38.

The square root of 63236981 is about 7952.1683206532. The cubic root of 63236981 is about 398.4040176534.

The spelling of 63236981 in words is "sixty-three million, two hundred thirty-six thousand, nine hundred eighty-one".