63840031 has 8 divisors (see below), whose sum is σ = 64963584. Its totient is φ = 62725080.

The previous prime is 63840013. The next prime is 63840071. The reversal of 63840031 is 13004836.

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 63840031 - 2⁵ = 63839999 is a prime.

It is a super-2 number, since 2×63840031² = 8151099116161922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 63839978 and 63840005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63840001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13840 + ... + 17866.

It is an arithmetic number, because the mean of its divisors is an integer number (8120448).

Almost surely, 2^63840031 is an apocalyptic number.

63840031 is a deficient number, since it is larger than the sum of its proper divisors (1123553).

63840031 is a wasteful number, since it uses less digits than its factorization.

63840031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 63840031 is about 7989.9956821015. The cubic root of 63840031 is about 399.6664531936. Note that the first 3 decimals are identical.

Adding to 63840031 its reverse (13004836), we get a palindrome (76844867).

The spelling of 63840031 in words is "sixty-three million, eight hundred forty thousand, thirty-one".