53998109 has 8 divisors (see below), whose sum is σ = 59284128. Its totient is φ = 48774960.

The previous prime is 53998093. The next prime is 53998111. The reversal of 53998109 is 90189935.

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 53998109 - 2⁴ = 53998093 is a prime.

It is a super-3 number, since 3×53998109³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53998109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53998129) 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, 13907 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (7410516).

Almost surely, 2^53998109 is an apocalyptic number.

It is an amenable number.

53998109 is a deficient number, since it is larger than the sum of its proper divisors (5286019).

53998109 is a wasteful number, since it uses less digits than its factorization.

53998109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31435.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 53998109 is about 7348.3405609702. The cubic root of 53998109 is about 377.9719028601.

The spelling of 53998109 in words is "fifty-three million, nine hundred ninety-eight thousand, one hundred nine".