73505881 has 4 divisors (see below), whose sum is σ = 74233764. Its totient is φ = 72778000.

The previous prime is 73505869. The next prime is 73505891. The reversal of 73505881 is 18850537.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18850537 = 349 ⋅54013.

It can be written as a sum of positive squares in 2 ways, for example, as 56490256 + 17015625 = 7516^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 73505881 - 2⁵ = 73505849 is a prime.

It is a super-2 number, since 2×73505881² = 10806229083172322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73505881.

It is not an unprimeable number, because it can be changed into a prime (73505801) 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, 363790 + ... + 363991.

It is an arithmetic number, because the mean of its divisors is an integer number (18558441).

Almost surely, 2^73505881 is an apocalyptic number.

It is an amenable number.

73505881 is a deficient number, since it is larger than the sum of its proper divisors (727883).

73505881 is a wasteful number, since it uses less digits than its factorization.

73505881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727882.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 73505881 is about 8573.5570797657. The cubic root of 73505881 is about 418.8971083054.

It can be divided in two parts, 7350 and 5881, that added together give a palindrome (13231).

The spelling of 73505881 in words is "seventy-three million, five hundred five thousand, eight hundred eighty-one".