53728901 has 8 divisors (see below), whose sum is σ = 55531224. Its totient is φ = 51950080.

The previous prime is 53728889. The next prime is 53728907. The reversal of 53728901 is 10982735.

It is a Cunningham number, because it is equal to 7330²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 53728900 = 1^2 + 7330^2 .

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 53728901 - 2¹⁸ = 53466757 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 (53728907) 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, 1166 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (6941403).

Almost surely, 2^53728901 is an apocalyptic number.

It is an amenable number.

53728901 is a deficient number, since it is larger than the sum of its proper divisors (1802323).

53728901 is a wasteful number, since it uses less digits than its factorization.

53728901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11751.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 53728901 is about 7330.0000682128. Note that the first 4 decimals coincide. The cubic root of 53728901 is about 377.3427288099.

The spelling of 53728901 in words is "fifty-three million, seven hundred twenty-eight thousand, nine hundred one".