64387263 has 8 divisors (see below), whose sum is σ = 86126976. Its totient is φ = 42786200.

The previous prime is 64387259. The next prime is 64387277. The reversal of 64387263 is 36278346.

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 64387263 - 2² = 64387259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64387223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33573 + ... + 35438.

It is an arithmetic number, because the mean of its divisors is an integer number (10765872).

Almost surely, 2^64387263 is an apocalyptic number.

64387263 is a deficient number, since it is larger than the sum of its proper divisors (21739713).

64387263 is a wasteful number, since it uses less digits than its factorization.

64387263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69325.

The product of its digits is 145152, while the sum is 39.

The square root of 64387263 is about 8024.1674334475. The cubic root of 64387263 is about 400.8051760580.

The spelling of 64387263 in words is "sixty-four million, three hundred eighty-seven thousand, two hundred sixty-three".