53820687 has 8 divisors (see below), whose sum is σ = 73287936. Its totient is φ = 35116952.

The previous prime is 53820647. The next prime is 53820707. The reversal of 53820687 is 78602835.

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 53820687 - 2¹⁵ = 53787919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53820617) 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, 190713 + ... + 190994.

It is an arithmetic number, because the mean of its divisors is an integer number (9160992).

Almost surely, 2^53820687 is an apocalyptic number.

53820687 is a deficient number, since it is larger than the sum of its proper divisors (19467249).

53820687 is a wasteful number, since it uses less digits than its factorization.

53820687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381757.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 53820687 is about 7336.2583787650. The cubic root of 53820687 is about 377.5574802463.

The spelling of 53820687 in words is "fifty-three million, eight hundred twenty thousand, six hundred eighty-seven".