64897265 has 4 divisors (see below), whose sum is σ = 77876724. Its totient is φ = 51917808.

The previous prime is 64897253. The next prime is 64897267. The reversal of 64897265 is 56279846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35129329 + 29767936 = 5927^2 + 5456^2 .

It is a cyclic number.

It is not a de Polignac number, because 64897265 - 2⁴ = 64897249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64897267) 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, 6489722 + ... + 6489731.

It is an arithmetic number, because the mean of its divisors is an integer number (19469181).

Almost surely, 2^64897265 is an apocalyptic number.

It is an amenable number.

64897265 is a deficient number, since it is larger than the sum of its proper divisors (12979459).

64897265 is a wasteful number, since it uses less digits than its factorization.

64897265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12979458.

The product of its digits is 725760, while the sum is 47.

The square root of 64897265 is about 8055.8838745354. The cubic root of 64897265 is about 401.8606337686.

The spelling of 64897265 in words is "sixty-four million, eight hundred ninety-seven thousand, two hundred sixty-five".