52661893 has 4 divisors (see below), whose sum is σ = 52783948. Its totient is φ = 52539840.

The previous prime is 52661867. The next prime is 52661897. The reversal of 52661893 is 39816625.

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 7745089 + 44916804 = 2783^2 + 6702^2 .

It is a cyclic number.

It is not a de Polignac number, because 52661893 - 2⁹ = 52661381 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 (52661897) 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, 60378 + ... + 61243.

It is an arithmetic number, because the mean of its divisors is an integer number (13195987).

Almost surely, 2^52661893 is an apocalyptic number.

It is an amenable number.

52661893 is a deficient number, since it is larger than the sum of its proper divisors (122055).

52661893 is a wasteful number, since it uses less digits than its factorization.

52661893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122054.

The product of its digits is 77760, while the sum is 40.

The square root of 52661893 is about 7256.8514522484. The cubic root of 52661893 is about 374.8281120389.

The spelling of 52661893 in words is "fifty-two million, six hundred sixty-one thousand, eight hundred ninety-three".