73138169 has 4 divisors (see below), whose sum is σ = 78764196. Its totient is φ = 67512144.

The previous prime is 73138139. The next prime is 73138171. The reversal of 73138169 is 96183137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5290000 + 67848169 = 2300^2 + 8237^2 .

It is a cyclic number.

It is not a de Polignac number, because 73138169 - 2¹² = 73134073 is a prime.

It is a super-2 number, since 2×73138169² = 10698383529345122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73138139) 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, 2812994 + ... + 2813019.

It is an arithmetic number, because the mean of its divisors is an integer number (19691049).

Almost surely, 2^73138169 is an apocalyptic number.

It is an amenable number.

73138169 is a deficient number, since it is larger than the sum of its proper divisors (5626027).

73138169 is a wasteful number, since it uses less digits than its factorization.

73138169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626026.

The product of its digits is 27216, while the sum is 38.

The square root of 73138169 is about 8552.0856520500. The cubic root of 73138169 is about 418.1974315918.

The spelling of 73138169 in words is "seventy-three million, one hundred thirty-eight thousand, one hundred sixty-nine".