63871951 has 8 divisors (see below), whose sum is σ = 75038544. Its totient is φ = 53598720.

The previous prime is 63871933. The next prime is 63871967. The reversal of 63871951 is 15917836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63871951 - 2¹¹ = 63869903 is a prime.

It is a super-2 number, since 2×63871951² = 8159252249092802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63871921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223186 + ... + 223471.

It is an arithmetic number, because the mean of its divisors is an integer number (9379818).

Almost surely, 2^63871951 is an apocalyptic number.

63871951 is a deficient number, since it is larger than the sum of its proper divisors (11166593).

63871951 is a wasteful number, since it uses less digits than its factorization.

63871951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446681.

The product of its digits is 45360, while the sum is 40.

The square root of 63871951 is about 7991.9929304273. The cubic root of 63871951 is about 399.7330531381.

It can be divided in two parts, 6387 and 1951, that added together give a palindrome (8338).

The spelling of 63871951 in words is "sixty-three million, eight hundred seventy-one thousand, nine hundred fifty-one".