73815823 has 2 divisors, whose sum is σ = 73815824. Its totient is φ = 73815822.

The previous prime is 73815733. The next prime is 73815857. The reversal of 73815823 is 32851837.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73815823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73815883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36907911 + 36907912.

It is an arithmetic number, because the mean of its divisors is an integer number (36907912).

Almost surely, 2^73815823 is an apocalyptic number.

73815823 is a deficient number, since it is larger than the sum of its proper divisors (1).

73815823 is an equidigital number, since it uses as much as digits as its factorization.

73815823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 73815823 is about 8591.6135271554. The cubic root of 73815823 is about 419.4850510569.

It can be divided in two parts, 738 and 15823, that added together give a palindrome (16561).

The spelling of 73815823 in words is "seventy-three million, eight hundred fifteen thousand, eight hundred twenty-three".