63947231 has 2 divisors, whose sum is σ = 63947232. Its totient is φ = 63947230.

The previous prime is 63947207. The next prime is 63947239. The reversal of 63947231 is 13274936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63947231 - 2¹⁴ = 63930847 is a prime.

It is a super-2 number, since 2×63947231² = 8178496705134722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63947191 and 63947200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63947239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31973615 + 31973616.

It is an arithmetic number, because the mean of its divisors is an integer number (31973616).

Almost surely, 2^63947231 is an apocalyptic number.

63947231 is a deficient number, since it is larger than the sum of its proper divisors (1).

63947231 is an equidigital number, since it uses as much as digits as its factorization.

63947231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 63947231 is about 7996.7012573936. The cubic root of 63947231 is about 399.8900343550.

The spelling of 63947231 in words is "sixty-three million, nine hundred forty-seven thousand, two hundred thirty-one".