73423181 has 8 divisors (see below), whose sum is σ = 80155320. Its totient is φ = 66845952.

The previous prime is 73423171. The next prime is 73423213. The reversal of 73423181 is 18132437.

It can be written as a sum of positive squares in 4 ways, for example, as 1020100 + 72403081 = 1010^2 + 8509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73423181 - 2⁶ = 73423117 is a prime.

It is a super-2 number, since 2×73423181² = 10781927016317522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73423151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37736 + ... + 39633.

It is an arithmetic number, because the mean of its divisors is an integer number (10019415).

Almost surely, 2^73423181 is an apocalyptic number.

It is an amenable number.

73423181 is a deficient number, since it is larger than the sum of its proper divisors (6732139).

73423181 is a wasteful number, since it uses less digits than its factorization.

73423181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77455.

The product of its digits is 4032, while the sum is 29.

The square root of 73423181 is about 8568.7327534473. The cubic root of 73423181 is about 418.7399517601.

The spelling of 73423181 in words is "seventy-three million, four hundred twenty-three thousand, one hundred eighty-one".