73218829 has 2 divisors, whose sum is σ = 73218830. Its totient is φ = 73218828.

The previous prime is 73218791. The next prime is 73218833. The reversal of 73218829 is 92881237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44863204 + 28355625 = 6698^2 + 5325^2 .

It is a cyclic number.

It is not a de Polignac number, because 73218829 - 2⁹ = 73218317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73218791 and 73218800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73218029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36609414 + 36609415.

It is an arithmetic number, because the mean of its divisors is an integer number (36609415).

Almost surely, 2^73218829 is an apocalyptic number.

It is an amenable number.

73218829 is a deficient number, since it is larger than the sum of its proper divisors (1).

73218829 is an equidigital number, since it uses as much as digits as its factorization.

73218829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 73218829 is about 8556.8001612752. The cubic root of 73218829 is about 418.3511106378.

It can be divided in two parts, 73218 and 829, that added together give a palindrome (74047).

The spelling of 73218829 in words is "seventy-three million, two hundred eighteen thousand, eight hundred twenty-nine".