53698 has 4 divisors (see below), whose sum is σ = 80550. Its totient is φ = 26848.

The previous prime is 53693. The next prime is 53699. The reversal of 53698 is 89635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49729 + 3969 = 223^2 + 63^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 53698.

It is not an unprimeable number, because it can be changed into a prime (53693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13423 + ... + 13426.

2⁵³⁶⁹⁸ is an apocalyptic number.

53698 is a deficient number, since it is larger than the sum of its proper divisors (26852).

53698 is a wasteful number, since it uses less digits than its factorization.

53698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26851.

The product of its digits is 6480, while the sum is 31.

The square root of 53698 is about 231.7282891664. The cubic root of 53698 is about 37.7270374803.

Subtracting 53698 from its reverse (89635), we obtain a cube (35937 = 33³).

The spelling of 53698 in words is "fifty-three thousand, six hundred ninety-eight".