64434709 has 8 divisors (see below), whose sum is σ = 70426368. Its totient is φ = 58687680.

The previous prime is 64434703. The next prime is 64434749. The reversal of 64434709 is 90743446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64434709 - 2⁵ = 64434677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64434703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60607 + ... + 61660.

It is an arithmetic number, because the mean of its divisors is an integer number (8803296).

Almost surely, 2^64434709 is an apocalyptic number.

It is an amenable number.

64434709 is a deficient number, since it is larger than the sum of its proper divisors (5991659).

64434709 is a wasteful number, since it uses less digits than its factorization.

64434709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122315.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 64434709 is about 8027.1233328011. The cubic root of 64434709 is about 400.9036009761.

It can be divided in two parts, 644 and 34709, that added together give a palindrome (35353).

The spelling of 64434709 in words is "sixty-four million, four hundred thirty-four thousand, seven hundred nine".