73398581 has 2 divisors, whose sum is σ = 73398582. Its totient is φ = 73398580.

The previous prime is 73398553. The next prime is 73398601. The reversal of 73398581 is 18589337.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 19140625 = 7366^2 + 4375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73398581 is a prime.

It is a super-2 number, since 2×73398581² = 10774703385627122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73398511) 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 as a sum of consecutive naturals, namely, 36699290 + 36699291.

It is an arithmetic number, because the mean of its divisors is an integer number (36699291).

Almost surely, 2^73398581 is an apocalyptic number.

It is an amenable number.

73398581 is a deficient number, since it is larger than the sum of its proper divisors (1).

73398581 is an equidigital number, since it uses as much as digits as its factorization.

73398581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 73398581 is about 8567.2971817254. The cubic root of 73398581 is about 418.6931810930.

The spelling of 73398581 in words is "seventy-three million, three hundred ninety-eight thousand, five hundred eighty-one".