53185973 has 4 divisors (see below), whose sum is σ = 53734380. Its totient is φ = 52637568.

The previous prime is 53185933. The next prime is 53185981. The reversal of 53185973 is 37958135.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27804529 + 25381444 = 5273^2 + 5038^2 .

It is a cyclic number.

It is not a de Polignac number, because 53185973 - 2²² = 48991669 is a prime.

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 53185973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53185903) 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, 274058 + ... + 274251.

It is an arithmetic number, because the mean of its divisors is an integer number (13433595).

Almost surely, 2^53185973 is an apocalyptic number.

It is an amenable number.

53185973 is a deficient number, since it is larger than the sum of its proper divisors (548407).

53185973 is an equidigital number, since it uses as much as digits as its factorization.

53185973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548406.

The product of its digits is 113400, while the sum is 41.

The square root of 53185973 is about 7292.8713823843. The cubic root of 53185973 is about 376.0674133126.

The spelling of 53185973 in words is "fifty-three million, one hundred eighty-five thousand, nine hundred seventy-three".