73428169 has 2 divisors, whose sum is σ = 73428170. Its totient is φ = 73428168.

The previous prime is 73428143. The next prime is 73428197. The reversal of 73428169 is 96182437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 11648569 = 7860^2 + 3413^2 .

It is a cyclic number.

It is not a de Polignac number, because 73428169 - 2⁹ = 73427657 is a prime.

It is a super-2 number, since 2×73428169² = 10783392005385122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73428109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36714084 + 36714085.

It is an arithmetic number, because the mean of its divisors is an integer number (36714085).

Almost surely, 2^73428169 is an apocalyptic number.

It is an amenable number.

73428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

73428169 is an equidigital number, since it uses as much as digits as its factorization.

73428169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 73428169 is about 8569.0238067122. The cubic root of 73428169 is about 418.7494339043.

The spelling of 73428169 in words is "seventy-three million, four hundred twenty-eight thousand, one hundred sixty-nine".