73172461 has 2 divisors, whose sum is σ = 73172462. Its totient is φ = 73172460.

The previous prime is 73172443. The next prime is 73172497. The reversal of 73172461 is 16427137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68376361 + 4796100 = 8269^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 73172461 - 2⁹ = 73171949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73172441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36586230 + 36586231.

It is an arithmetic number, because the mean of its divisors is an integer number (36586231).

Almost surely, 2^73172461 is an apocalyptic number.

It is an amenable number.

73172461 is a deficient number, since it is larger than the sum of its proper divisors (1).

73172461 is an equidigital number, since it uses as much as digits as its factorization.

73172461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 73172461 is about 8554.0903081508. The cubic root of 73172461 is about 418.2627808971.

Adding to 73172461 its reverse (16427137), we get a palindrome (89599598).

The spelling of 73172461 in words is "seventy-three million, one hundred seventy-two thousand, four hundred sixty-one".