73438133 has 2 divisors, whose sum is σ = 73438134. Its totient is φ = 73438132.

The previous prime is 73438129. The next prime is 73438153. The reversal of 73438133 is 33183437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38663524 + 34774609 = 6218^2 + 5897^2 .

It is a cyclic number.

It is not a de Polignac number, because 73438133 - 2² = 73438129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73438133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73438153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36719066 + 36719067.

It is an arithmetic number, because the mean of its divisors is an integer number (36719067).

Almost surely, 2^73438133 is an apocalyptic number.

It is an amenable number.

73438133 is a deficient number, since it is larger than the sum of its proper divisors (1).

73438133 is an equidigital number, since it uses as much as digits as its factorization.

73438133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 73438133 is about 8569.6051834376. The cubic root of 73438133 is about 418.7683740954.

The spelling of 73438133 in words is "seventy-three million, four hundred thirty-eight thousand, one hundred thirty-three".