64839235 has 4 divisors (see below), whose sum is σ = 77807088. Its totient is φ = 51871384.

The previous prime is 64839217. The next prime is 64839263. The reversal of 64839235 is 53293846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53293846 = 2 ⋅26646923.

It is a cyclic number.

It is not a de Polignac number, because 64839235 - 2⁷ = 64839107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6483919 + ... + 6483928.

It is an arithmetic number, because the mean of its divisors is an integer number (19451772).

Almost surely, 2^64839235 is an apocalyptic number.

64839235 is a deficient number, since it is larger than the sum of its proper divisors (12967853).

64839235 is a wasteful number, since it uses less digits than its factorization.

64839235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12967852.

The product of its digits is 155520, while the sum is 40.

The square root of 64839235 is about 8052.2813537531. The cubic root of 64839235 is about 401.7408191313.

The spelling of 64839235 in words is "sixty-four million, eight hundred thirty-nine thousand, two hundred thirty-five".