73036861 has 4 divisors (see below), whose sum is σ = 73195072. Its totient is φ = 72878652.

The previous prime is 73036849. The next prime is 73036889. The reversal of 73036861 is 16863037.

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: 16863037 = 223 ⋅75619.

It is a cyclic number.

It is not a de Polignac number, because 73036861 - 2⁹ = 73036349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73036801) 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, 78411 + ... + 79336.

It is an arithmetic number, because the mean of its divisors is an integer number (18298768).

Almost surely, 2^73036861 is an apocalyptic number.

It is an amenable number.

73036861 is a deficient number, since it is larger than the sum of its proper divisors (158211).

73036861 is a wasteful number, since it uses less digits than its factorization.

73036861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158210.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 73036861 is about 8546.1605999419. The cubic root of 73036861 is about 418.0042523777.

Adding to 73036861 its reverse (16863037), we get a palindrome (89899898).

The spelling of 73036861 in words is "seventy-three million, thirty-six thousand, eight hundred sixty-one".