53898721 has 16 divisors (see below), whose sum is σ = 58662144. Its totient is φ = 49330944.

The previous prime is 53898703. The next prime is 53898731. The reversal of 53898721 is 12789835.

It is a cyclic number.

It is not a de Polignac number, because 53898721 - 2⁹ = 53898209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53898701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146680 + ... + 147046.

It is an arithmetic number, because the mean of its divisors is an integer number (3666384).

Almost surely, 2^53898721 is an apocalyptic number.

It is an amenable number.

53898721 is a deficient number, since it is larger than the sum of its proper divisors (4763423).

53898721 is a wasteful number, since it uses less digits than its factorization.

53898721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 120960, while the sum is 43.

The square root of 53898721 is about 7341.5748310563. The cubic root of 53898721 is about 377.7398642235.

The spelling of 53898721 in words is "fifty-three million, eight hundred ninety-eight thousand, seven hundred twenty-one".