873540921 has 8 divisors (see below), whose sum is σ = 1270605024. Its totient is φ = 529418720.

The previous prime is 873540901. The next prime is 873540977. The reversal of 873540921 is 129045378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 873540921 - 2¹⁰ = 873539897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 873540921.

It is not an unprimeable number, because it can be changed into a prime (873540901) 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 7 ways as a sum of consecutive naturals, for example, 13235436 + ... + 13235501.

It is an arithmetic number, because the mean of its divisors is an integer number (158825628).

Almost surely, 2^873540921 is an apocalyptic number.

It is an amenable number.

873540921 is a deficient number, since it is larger than the sum of its proper divisors (397064103).

873540921 is a wasteful number, since it uses less digits than its factorization.

873540921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26470951.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 873540921 is about 29555.7256889422. The cubic root of 873540921 is about 955.9336541348.

The spelling of 873540921 in words is "eight hundred seventy-three million, five hundred forty thousand, nine hundred twenty-one".