64968439 has 4 divisors (see below), whose sum is σ = 67208760. Its totient is φ = 62728120.

The previous prime is 64968413. The next prime is 64968451. The reversal of 64968439 is 93486946.

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 64968439 - 2⁷ = 64968311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64968392 and 64968401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64962439) 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, 1120117 + ... + 1120174.

It is an arithmetic number, because the mean of its divisors is an integer number (16802190).

Almost surely, 2^64968439 is an apocalyptic number.

64968439 is a deficient number, since it is larger than the sum of its proper divisors (2240321).

64968439 is a wasteful number, since it uses less digits than its factorization.

64968439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240320.

The product of its digits is 1119744, while the sum is 49.

The square root of 64968439 is about 8060.3001805144. The cubic root of 64968439 is about 402.0074893616.

The spelling of 64968439 in words is "sixty-four million, nine hundred sixty-eight thousand, four hundred thirty-nine".