64235447 has 4 divisors (see below), whose sum is σ = 67616280. Its totient is φ = 60854616.

The previous prime is 64235407. The next prime is 64235459. The reversal of 64235447 is 74453246.

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 64235447 - 2²⁴ = 47458231 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 (64235407) 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, 1690388 + ... + 1690425.

It is an arithmetic number, because the mean of its divisors is an integer number (16904070).

Almost surely, 2^64235447 is an apocalyptic number.

64235447 is a deficient number, since it is larger than the sum of its proper divisors (3380833).

64235447 is a wasteful number, since it uses less digits than its factorization.

64235447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380832.

The product of its digits is 80640, while the sum is 35.

The square root of 64235447 is about 8014.7019283315. The cubic root of 64235447 is about 400.4899142983.

The spelling of 64235447 in words is "sixty-four million, two hundred thirty-five thousand, four hundred forty-seven".