63389971 has 2 divisors, whose sum is σ = 63389972. Its totient is φ = 63389970.

The previous prime is 63389959. The next prime is 63389999. The reversal of 63389971 is 17998336.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63389971 - 2¹⁹ = 62865683 is a prime.

It is not a weakly prime, because it can be changed into another prime (63389071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31694985 + 31694986.

It is an arithmetic number, because the mean of its divisors is an integer number (31694986).

Almost surely, 2^63389971 is an apocalyptic number.

63389971 is a deficient number, since it is larger than the sum of its proper divisors (1).

63389971 is an equidigital number, since it uses as much as digits as its factorization.

63389971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 63389971 is about 7961.7818985451. The cubic root of 63389971 is about 398.7250468035.

The spelling of 63389971 in words is "sixty-three million, three hundred eighty-nine thousand, nine hundred seventy-one".