73817131 has 2 divisors, whose sum is σ = 73817132. Its totient is φ = 73817130.

The previous prime is 73817087. The next prime is 73817141. The reversal of 73817131 is 13171837.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73817131 - 2¹¹ = 73815083 is a prime.

It is a super-2 number, since 2×73817131² = 10897937658142322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73817093 and 73817102.

It is not a weakly prime, because it can be changed into another prime (73817141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36908565 + 36908566.

It is an arithmetic number, because the mean of its divisors is an integer number (36908566).

Almost surely, 2^73817131 is an apocalyptic number.

73817131 is a deficient number, since it is larger than the sum of its proper divisors (1).

73817131 is an equidigital number, since it uses as much as digits as its factorization.

73817131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 31.

The square root of 73817131 is about 8591.6896475606. The cubic root of 73817131 is about 419.4875287696.

Adding to 73817131 its reverse (13171837), we get a palindrome (86988968).

The spelling of 73817131 in words is "seventy-three million, eight hundred seventeen thousand, one hundred thirty-one".