73853921 has 4 divisors (see below), whose sum is σ = 74229012. Its totient is φ = 73478832.

The previous prime is 73853917. The next prime is 73853939. The reversal of 73853921 is 12935837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12935837 = 1123 ⋅11519.

It can be written as a sum of positive squares in 2 ways, for example, as 58140625 + 15713296 = 7625^2 + 3964^2 .

It is a cyclic number.

It is not a de Polignac number, because 73853921 - 2² = 73853917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73853911) 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, 187250 + ... + 187643.

It is an arithmetic number, because the mean of its divisors is an integer number (18557253).

Almost surely, 2^73853921 is an apocalyptic number.

It is an amenable number.

73853921 is a deficient number, since it is larger than the sum of its proper divisors (375091).

73853921 is a wasteful number, since it uses less digits than its factorization.

73853921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375090.

The product of its digits is 45360, while the sum is 38.

The square root of 73853921 is about 8593.8304032602. The cubic root of 73853921 is about 419.5572071888.

The spelling of 73853921 in words is "seventy-three million, eight hundred fifty-three thousand, nine hundred twenty-one".