73512161 has 2 divisors, whose sum is σ = 73512162. Its totient is φ = 73512160.

The previous prime is 73512079. The next prime is 73512203. The reversal of 73512161 is 16121537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 6599761 = 8180^2 + 2569^2 .

It is an emirp because it is prime and its reverse (16121537) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73512161 - 2²⁶ = 6403297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73512161.

It is not a weakly prime, because it can be changed into another prime (73517161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36756080 + 36756081.

It is an arithmetic number, because the mean of its divisors is an integer number (36756081).

Almost surely, 2^73512161 is an apocalyptic number.

It is an amenable number.

73512161 is a deficient number, since it is larger than the sum of its proper divisors (1).

73512161 is an equidigital number, since it uses as much as digits as its factorization.

73512161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 73512161 is about 8573.9233143293. The cubic root of 73512161 is about 418.9090375047.

Adding to 73512161 its reverse (16121537), we get a palindrome (89633698).

The spelling of 73512161 in words is "seventy-three million, five hundred twelve thousand, one hundred sixty-one".