42823013 has 4 divisors (see below), whose sum is σ = 42836268. Its totient is φ = 42809760.

The previous prime is 42823007. The next prime is 42823019. The reversal of 42823013 is 31032824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (42823007) and next prime (42823019).

It can be written as a sum of positive squares in 2 ways, for example, as 20232004 + 22591009 = 4498^2 + 4753^2 .

It is a cyclic number.

It is not a de Polignac number, because 42823013 - 2¹² = 42818917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42823013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42823019) 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, 1745 + ... + 9417.

It is an arithmetic number, because the mean of its divisors is an integer number (10709067).

Almost surely, 2^42823013 is an apocalyptic number.

It is an amenable number.

42823013 is a deficient number, since it is larger than the sum of its proper divisors (13255).

42823013 is an equidigital number, since it uses as much as digits as its factorization.

42823013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13254.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 42823013 is about 6543.9294770039. The cubic root of 42823013 is about 349.8584815619.

Adding to 42823013 its reverse (31032824), we get a palindrome (73855837).

The spelling of 42823013 in words is "forty-two million, eight hundred twenty-three thousand, thirteen".