64268987 has 4 divisors (see below), whose sum is σ = 65174256. Its totient is φ = 63363720.

The previous prime is 64268977. The next prime is 64269011. The reversal of 64268987 is 78986246.

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 64268987 - 2¹⁰ = 64267963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64268917) 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, 452528 + ... + 452669.

It is an arithmetic number, because the mean of its divisors is an integer number (16293564).

Almost surely, 2^64268987 is an apocalyptic number.

64268987 is a deficient number, since it is larger than the sum of its proper divisors (905269).

64268987 is an equidigital number, since it uses as much as digits as its factorization.

64268987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905268.

The product of its digits is 1161216, while the sum is 50.

The square root of 64268987 is about 8016.7940599719. The cubic root of 64268987 is about 400.5596063202.

The spelling of 64268987 in words is "sixty-four million, two hundred sixty-eight thousand, nine hundred eighty-seven".