53892721 has 8 divisors (see below), whose sum is σ = 56894400. Its totient is φ = 50907600.

The previous prime is 53892719. The next prime is 53892739. The reversal of 53892721 is 12729835.

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 53892721 - 2¹ = 53892719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53892781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2871 + ... + 10771.

It is an arithmetic number, because the mean of its divisors is an integer number (7111800).

Almost surely, 2^53892721 is an apocalyptic number.

It is an amenable number.

53892721 is a deficient number, since it is larger than the sum of its proper divisors (3001679).

53892721 is a wasteful number, since it uses less digits than its factorization.

53892721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279.

The product of its digits is 30240, while the sum is 37.

The square root of 53892721 is about 7341.1661880113. The cubic root of 53892721 is about 377.7258470492.

The spelling of 53892721 in words is "fifty-three million, eight hundred ninety-two thousand, seven hundred twenty-one".