63081971 has 4 divisors (see below), whose sum is σ = 63306744. Its totient is φ = 62857200.

The previous prime is 63081947. The next prime is 63081983. The reversal of 63081971 is 17918036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63081971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63081901) 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, 111965 + ... + 112526.

It is an arithmetic number, because the mean of its divisors is an integer number (15826686).

Almost surely, 2^63081971 is an apocalyptic number.

63081971 is a deficient number, since it is larger than the sum of its proper divisors (224773).

63081971 is a wasteful number, since it uses less digits than its factorization.

63081971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224772.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 63081971 is about 7942.4159422684. The cubic root of 63081971 is about 398.0782212864.

The spelling of 63081971 in words is "sixty-three million, eighty-one thousand, nine hundred seventy-one".