64379439 has 12 divisors (see below), whose sum is σ = 93863016. Its totient is φ = 42517872.

The previous prime is 64379437. The next prime is 64379453. The reversal of 64379439 is 93497346.

It is not a de Polignac number, because 64379439 - 2¹ = 64379437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64379394 and 64379403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64379437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32464 + ... + 34389.

It is an arithmetic number, because the mean of its divisors is an integer number (7821918).

Almost surely, 2^64379439 is an apocalyptic number.

64379439 is a deficient number, since it is larger than the sum of its proper divisors (29483577).

64379439 is a wasteful number, since it uses less digits than its factorization.

64379439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66966 (or 66963 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 64379439 is about 8023.6798914214. The cubic root of 64379439 is about 400.7889408246.

It can be divided in two parts, 6437 and 9439, that added together give a square (15876 = 126²).

The spelling of 64379439 in words is "sixty-four million, three hundred seventy-nine thousand, four hundred thirty-nine".