64858769 has 4 divisors (see below), whose sum is σ = 64983780. Its totient is φ = 64733760.

The previous prime is 64858733. The next prime is 64858771. The reversal of 64858769 is 96785846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96785846 = 2 ⋅48392923.

It can be written as a sum of positive squares in 2 ways, for example, as 11641744 + 53217025 = 3412^2 + 7295^2 .

It is a cyclic number.

It is not a de Polignac number, because 64858769 - 2⁸ = 64858513 is a prime.

It is a super-2 number, since 2×64858769² = 8413319832390722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64858769.

It is not an unprimeable number, because it can be changed into a prime (64858069) 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, 61724 + ... + 62765.

It is an arithmetic number, because the mean of its divisors is an integer number (16245945).

Almost surely, 2^64858769 is an apocalyptic number.

It is an amenable number.

64858769 is a deficient number, since it is larger than the sum of its proper divisors (125011).

64858769 is a wasteful number, since it uses less digits than its factorization.

64858769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125010.

The product of its digits is 2903040, while the sum is 53.

The square root of 64858769 is about 8053.4942105896. The cubic root of 64858769 is about 401.7811589925.

The spelling of 64858769 in words is "sixty-four million, eight hundred fifty-eight thousand, seven hundred sixty-nine".