73043881 has 4 divisors (see below), whose sum is σ = 73090564. Its totient is φ = 72997200.

The previous prime is 73043863. The next prime is 73043891. The reversal of 73043881 is 18834037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62094400 + 10949481 = 7880^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 73043881 - 2⁷ = 73043753 is a prime.

It is a super-2 number, since 2×73043881² = 10670817103084322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73043891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20910 + ... + 24151.

It is an arithmetic number, because the mean of its divisors is an integer number (18272641).

Almost surely, 2^73043881 is an apocalyptic number.

It is an amenable number.

73043881 is a deficient number, since it is larger than the sum of its proper divisors (46683).

73043881 is a wasteful number, since it uses less digits than its factorization.

73043881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46682.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 73043881 is about 8546.5713008200. The cubic root of 73043881 is about 418.0176442267.

The spelling of 73043881 in words is "seventy-three million, forty-three thousand, eight hundred eighty-one".