63879943 has 2 divisors, whose sum is σ = 63879944. Its totient is φ = 63879942.

The previous prime is 63879887. The next prime is 63879967. The reversal of 63879943 is 34997836.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63879943 - 2¹⁷ = 63748871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63879143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939971 + 31939972.

It is an arithmetic number, because the mean of its divisors is an integer number (31939972).

Almost surely, 2^63879943 is an apocalyptic number.

63879943 is a deficient number, since it is larger than the sum of its proper divisors (1).

63879943 is an equidigital number, since it uses as much as digits as its factorization.

63879943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 63879943 is about 7992.4929152299. The cubic root of 63879943 is about 399.7497246883.

The spelling of 63879943 in words is "sixty-three million, eight hundred seventy-nine thousand, nine hundred forty-three".