64389371 has 4 divisors (see below), whose sum is σ = 64458312. Its totient is φ = 64320432.

The previous prime is 64389359. The next prime is 64389407. The reversal of 64389371 is 17398346.

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 64389371 - 2¹⁰ = 64388347 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 33050 + ... + 34943.

It is an arithmetic number, because the mean of its divisors is an integer number (16114578).

Almost surely, 2^64389371 is an apocalyptic number.

64389371 is a deficient number, since it is larger than the sum of its proper divisors (68941).

64389371 is an equidigital number, since it uses as much as digits as its factorization.

64389371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68940.

The product of its digits is 108864, while the sum is 41.

The square root of 64389371 is about 8024.2987855638. The cubic root of 64389371 is about 400.8095500498.

Subtracting from 64389371 its reverse (17398346), we obtain a square (46991025 = 6855²).

The spelling of 64389371 in words is "sixty-four million, three hundred eighty-nine thousand, three hundred seventy-one".