73117557 has 6 divisors (see below), whose sum is σ = 105614262. Its totient is φ = 48745032.

The previous prime is 73117549. The next prime is 73117559. The reversal of 73117557 is 75571137.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63345681 + 9771876 = 7959^2 + 3126^2 .

It is not a de Polignac number, because 73117557 - 2³ = 73117549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73117559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4062078 + ... + 4062095.

It is an arithmetic number, because the mean of its divisors is an integer number (17602377).

Almost surely, 2^73117557 is an apocalyptic number.

It is an amenable number.

73117557 is a deficient number, since it is larger than the sum of its proper divisors (32496705).

73117557 is a wasteful number, since it uses less digits than its factorization.

73117557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124179 (or 8124176 counting only the distinct ones).

The product of its digits is 25725, while the sum is 36.

The square root of 73117557 is about 8550.8804809797. The cubic root of 73117557 is about 418.1581420505.

The spelling of 73117557 in words is "seventy-three million, one hundred seventeen thousand, five hundred fifty-seven".