73289861 has 4 divisors (see below), whose sum is σ = 73309632. Its totient is φ = 73270092.

The previous prime is 73289851. The next prime is 73289863. The reversal of 73289861 is 16898237.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16898237 = 887 ⋅19051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73289861 is a prime.

It is a deceptive number, since it divides R_73289860.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73289863) 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 3 ways as a sum of consecutive naturals, for example, 2471 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (18327408).

Almost surely, 2^73289861 is an apocalyptic number.

73289861 is the 4943-rd octagonal number.

It is an amenable number.

73289861 is a deficient number, since it is larger than the sum of its proper divisors (19771).

73289861 is a wasteful number, since it uses less digits than its factorization.

73289861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19770.

The product of its digits is 145152, while the sum is 44.

The square root of 73289861 is about 8560.9497720755. The cubic root of 73289861 is about 418.4863523149.

The spelling of 73289861 in words is "seventy-three million, two hundred eighty-nine thousand, eight hundred sixty-one".