64407271 has 4 divisors (see below), whose sum is σ = 68195952. Its totient is φ = 60618592.

The previous prime is 64407263. The next prime is 64407281. The reversal of 64407271 is 17270446.

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 64407271 - 2³ = 64407263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64407251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894315 + ... + 1894348.

It is an arithmetic number, because the mean of its divisors is an integer number (17048988).

Almost surely, 2^64407271 is an apocalyptic number.

64407271 is a deficient number, since it is larger than the sum of its proper divisors (3788681).

64407271 is a wasteful number, since it uses less digits than its factorization.

64407271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788680.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 64407271 is about 8025.4140703144. The cubic root of 64407271 is about 400.8466877850.

The spelling of 64407271 in words is "sixty-four million, four hundred seven thousand, two hundred seventy-one".