53870661 has 24 divisors (see below), whose sum is σ = 86693880. Its totient is φ = 32006016.

The previous prime is 53870659. The next prime is 53870699. The reversal of 53870661 is 16607835.

It can be written as a sum of positive squares in 4 ways, for example, as 16892100 + 36978561 = 4110^2 + 6081^2 .

It is not a de Polignac number, because 53870661 - 2¹ = 53870659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53870651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4546 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (3612245).

Almost surely, 2^53870661 is an apocalyptic number.

It is an amenable number.

53870661 is a deficient number, since it is larger than the sum of its proper divisors (32823219).

53870661 is a wasteful number, since it uses less digits than its factorization.

53870661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15925 (or 15922 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 53870661 is about 7339.6635481471. The cubic root of 53870661 is about 377.6743016257.

The spelling of 53870661 in words is "fifty-three million, eight hundred seventy thousand, six hundred sixty-one".