64831823 has 4 divisors (see below), whose sum is σ = 74093520. Its totient is φ = 55570128.

The previous prime is 64831801. The next prime is 64831841. The reversal of 64831823 is 32813846.

It is a happy number.

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 64831823 - 2⁶ = 64831759 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 (64831853) 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, 4630838 + ... + 4630851.

It is an arithmetic number, because the mean of its divisors is an integer number (18523380).

Almost surely, 2^64831823 is an apocalyptic number.

64831823 is a deficient number, since it is larger than the sum of its proper divisors (9261697).

64831823 is an equidigital number, since it uses as much as digits as its factorization.

64831823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9261696.

The product of its digits is 27648, while the sum is 35.

The square root of 64831823 is about 8051.8210983603. The cubic root of 64831823 is about 401.7255104147.

The spelling of 64831823 in words is "sixty-four million, eight hundred thirty-one thousand, eight hundred twenty-three".