64091267 has 4 divisors (see below), whose sum is σ = 64725936. Its totient is φ = 63456600.

The previous prime is 64091249. The next prime is 64091273. The reversal of 64091267 is 76219046.

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 64091267 - 2²⁰ = 63042691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64091567) 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, 317183 + ... + 317384.

It is an arithmetic number, because the mean of its divisors is an integer number (16181484).

Almost surely, 2^64091267 is an apocalyptic number.

64091267 is a deficient number, since it is larger than the sum of its proper divisors (634669).

64091267 is a wasteful number, since it uses less digits than its factorization.

64091267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634668.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 64091267 is about 8005.7021553390. The cubic root of 64091267 is about 400.1900492722.

The spelling of 64091267 in words is "sixty-four million, ninety-one thousand, two hundred sixty-seven".