63864291 has 16 divisors (see below), whose sum is σ = 90353664. Its totient is φ = 39986304.

The previous prime is 63864233. The next prime is 63864337. The reversal of 63864291 is 19246836.

It is not a de Polignac number, because 63864291 - 2¹¹ = 63862243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63864191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29926 + ... + 31988.

It is an arithmetic number, because the mean of its divisors is an integer number (5647104).

Almost surely, 2^63864291 is an apocalyptic number.

63864291 is a deficient number, since it is larger than the sum of its proper divisors (26489373).

63864291 is a wasteful number, since it uses less digits than its factorization.

63864291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690.

The product of its digits is 62208, while the sum is 39.

The square root of 63864291 is about 7991.5136864051. The cubic root of 63864291 is about 399.7170728444.

The spelling of 63864291 in words is "sixty-three million, eight hundred sixty-four thousand, two hundred ninety-one".