64381823 has 24 divisors (see below), whose sum is σ = 76663296. Its totient is φ = 53557200.

The previous prime is 64381819. The next prime is 64381829. The reversal of 64381823 is 32818346.

It is a happy number.

It is not a de Polignac number, because 64381823 - 2² = 64381819 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 (64381829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122840 + ... + 123362.

It is an arithmetic number, because the mean of its divisors is an integer number (3194304).

Almost surely, 2^64381823 is an apocalyptic number.

64381823 is a deficient number, since it is larger than the sum of its proper divisors (12281473).

64381823 is a wasteful number, since it uses less digits than its factorization.

64381823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 584 counting only the distinct ones).

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

The square root of 64381823 is about 8023.8284503097. The cubic root of 64381823 is about 400.7938878960.

The spelling of 64381823 in words is "sixty-four million, three hundred eighty-one thousand, eight hundred twenty-three".