53872661 has 4 divisors (see below), whose sum is σ = 53976192. Its totient is φ = 53769132.

The previous prime is 53872649. The next prime is 53872673. The reversal of 53872661 is 16627835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (53872649) and next prime (53872673).

It is a cyclic number.

It is not a de Polignac number, because 53872661 - 2¹⁰ = 53871637 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 (53872631) 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, 50981 + ... + 52026.

It is an arithmetic number, because the mean of its divisors is an integer number (13494048).

Almost surely, 2^53872661 is an apocalyptic number.

It is an amenable number.

53872661 is a deficient number, since it is larger than the sum of its proper divisors (103531).

53872661 is a wasteful number, since it uses less digits than its factorization.

53872661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103530.

The product of its digits is 60480, while the sum is 38.

The square root of 53872661 is about 7339.7997929099. The cubic root of 53872661 is about 377.6789754082.

The spelling of 53872661 in words is "fifty-three million, eight hundred seventy-two thousand, six hundred sixty-one".