64389345 has 32 divisors (see below), whose sum is σ = 106014720. Its totient is φ = 33359040.

The previous prime is 64389341. The next prime is 64389359. The reversal of 64389345 is 54398346.

It is not a de Polignac number, because 64389345 - 2² = 64389341 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64389297 and 64389306.

It is not an unprimeable number, because it can be changed into a prime (64389341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78990 + ... + 79800.

It is an arithmetic number, because the mean of its divisors is an integer number (3312960).

Almost surely, 2^64389345 is an apocalyptic number.

It is an amenable number.

64389345 is a deficient number, since it is larger than the sum of its proper divisors (41625375).

64389345 is a wasteful number, since it uses less digits than its factorization.

64389345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965.

The product of its digits is 311040, while the sum is 42.

The square root of 64389345 is about 8024.2971654843. The cubic root of 64389345 is about 400.8094961017.

Subtracting from 64389345 its reverse (54398346), we obtain a palindrome (9990999).

The spelling of 64389345 in words is "sixty-four million, three hundred eighty-nine thousand, three hundred forty-five".