73890881 has 4 divisors (see below), whose sum is σ = 77103552. Its totient is φ = 70678212.

The previous prime is 73890877. The next prime is 73890931. The reversal of 73890881 is 18809837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73890881 - 2² = 73890877 is a prime.

It is a super-2 number, since 2×73890881² = 10919724589912322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73890281) 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 in 3 ways as a sum of consecutive naturals, for example, 1606301 + ... + 1606346.

It is an arithmetic number, because the mean of its divisors is an integer number (19275888).

Almost surely, 2^73890881 is an apocalyptic number.

It is an amenable number.

73890881 is a deficient number, since it is larger than the sum of its proper divisors (3212671).

73890881 is a wasteful number, since it uses less digits than its factorization.

73890881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212670.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 73890881 is about 8595.9805141706. The cubic root of 73890881 is about 419.6271842828.

It can be divided in two parts, 738 and 90881, that added together give a palindrome (91619).

The spelling of 73890881 in words is "seventy-three million, eight hundred ninety thousand, eight hundred eighty-one".