53861687 has 16 divisors (see below), whose sum is σ = 59933952. Its totient is φ = 47997120.

The previous prime is 53861669. The next prime is 53861693. The reversal of 53861687 is 78616835.

It is a cyclic number.

It is not a de Polignac number, because 53861687 - 2²² = 49667383 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 (53861617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155048 + ... + 155394.

It is an arithmetic number, because the mean of its divisors is an integer number (3745872).

Almost surely, 2^53861687 is an apocalyptic number.

53861687 is a deficient number, since it is larger than the sum of its proper divisors (6072265).

53861687 is a wasteful number, since it uses less digits than its factorization.

53861687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its digits is 241920, while the sum is 44.

The square root of 53861687 is about 7339.0521867609. The cubic root of 53861687 is about 377.6533289396.

The spelling of 53861687 in words is "fifty-three million, eight hundred sixty-one thousand, six hundred eighty-seven".