63875791 has 4 divisors (see below), whose sum is σ = 73000912. Its totient is φ = 54750672.

The previous prime is 63875767. The next prime is 63875797. The reversal of 63875791 is 19757836.

63875791 is nontrivially palindromic in base 4.

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

It is a cyclic number.

It is not a de Polignac number, because 63875791 - 2¹⁵ = 63843023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63875797) 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 3 ways as a sum of consecutive naturals, for example, 4562550 + ... + 4562563.

It is an arithmetic number, because the mean of its divisors is an integer number (18250228).

Almost surely, 2^63875791 is an apocalyptic number.

63875791 is a deficient number, since it is larger than the sum of its proper divisors (9125121).

63875791 is an equidigital number, since it uses as much as digits as its factorization.

63875791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9125120.

The product of its digits is 317520, while the sum is 46.

The square root of 63875791 is about 7992.2331672693. The cubic root of 63875791 is about 399.7410636661.

The spelling of 63875791 in words is "sixty-three million, eight hundred seventy-five thousand, seven hundred ninety-one".