73786921 has 24 divisors (see below), whose sum is σ = 85591296. Its totient is φ = 63423360.

The previous prime is 73786903. The next prime is 73786931. The reversal of 73786921 is 12968737.

It is a happy number.

It is not a de Polignac number, because 73786921 - 2⁷ = 73786793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73786931) 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 23 ways as a sum of consecutive naturals, for example, 159136 + ... + 159598.

It is an arithmetic number, because the mean of its divisors is an integer number (3566304).

Almost surely, 2^73786921 is an apocalyptic number.

It is an amenable number.

73786921 is a deficient number, since it is larger than the sum of its proper divisors (11804375).

73786921 is a wasteful number, since it uses less digits than its factorization.

73786921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 540 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 73786921 is about 8589.9313734162. The cubic root of 73786921 is about 419.4302952284.

The spelling of 73786921 in words is "seventy-three million, seven hundred eighty-six thousand, nine hundred twenty-one".