64887263 has 4 divisors (see below), whose sum is σ = 74156880. Its totient is φ = 55617648.

The previous prime is 64887227. The next prime is 64887271. The reversal of 64887263 is 36278846.

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 64887263 - 2¹⁶ = 64821727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64887293) 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, 4634798 + ... + 4634811.

It is an arithmetic number, because the mean of its divisors is an integer number (18539220).

Almost surely, 2^64887263 is an apocalyptic number.

64887263 is a deficient number, since it is larger than the sum of its proper divisors (9269617).

64887263 is an equidigital number, since it uses as much as digits as its factorization.

64887263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9269616.

The product of its digits is 387072, while the sum is 44.

The square root of 64887263 is about 8055.2630621228. The cubic root of 64887263 is about 401.8399877184.

The spelling of 64887263 in words is "sixty-four million, eight hundred eighty-seven thousand, two hundred sixty-three".