53998493 has 4 divisors (see below), whose sum is σ = 55860540. Its totient is φ = 52136448.

The previous prime is 53998489. The next prime is 53998499. The reversal of 53998493 is 39489935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39489935 = 5 ⋅7897987.

It can be written as a sum of positive squares in 2 ways, for example, as 45454564 + 8543929 = 6742^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 53998493 - 2² = 53998489 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 (53998499) 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, 930980 + ... + 931037.

It is an arithmetic number, because the mean of its divisors is an integer number (13965135).

Almost surely, 2^53998493 is an apocalyptic number.

It is an amenable number.

53998493 is a deficient number, since it is larger than the sum of its proper divisors (1862047).

53998493 is a wasteful number, since it uses less digits than its factorization.

53998493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862046.

The product of its digits is 1049760, while the sum is 50.

The square root of 53998493 is about 7348.3666892718. The cubic root of 53998493 is about 377.9727988227.

The spelling of 53998493 in words is "fifty-three million, nine hundred ninety-eight thousand, four hundred ninety-three".