64864357 has 4 divisors (see below), whose sum is σ = 65593260. Its totient is φ = 64135456.

The previous prime is 64864351. The next prime is 64864433. The reversal of 64864357 is 75346846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75346846 = 2 ⋅37673423.

It can be written as a sum of positive squares in 2 ways, for example, as 34680321 + 30184036 = 5889^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 64864357 - 2¹¹ = 64862309 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 (64864351) 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, 364318 + ... + 364495.

It is an arithmetic number, because the mean of its divisors is an integer number (16398315).

Almost surely, 2^64864357 is an apocalyptic number.

It is an amenable number.

64864357 is a deficient number, since it is larger than the sum of its proper divisors (728903).

64864357 is an equidigital number, since it uses as much as digits as its factorization.

64864357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728902.

The product of its digits is 483840, while the sum is 43.

The square root of 64864357 is about 8053.8411332730. The cubic root of 64864357 is about 401.7926973379.

The spelling of 64864357 in words is "sixty-four million, eight hundred sixty-four thousand, three hundred fifty-seven".