61853 has 4 divisors (see below), whose sum is σ = 67488. Its totient is φ = 56220.

The previous prime is 61843. The next prime is 61861. The reversal of 61853 is 35816.

61853 is nontrivially palindromic in base 14.

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 a cyclic number.

It is not a de Polignac number, because 61853 - 2⁴ = 61837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61813) 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, 2801 + ... + 2822.

It is an arithmetic number, because the mean of its divisors is an integer number (16872).

2⁶¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

61853 is a deficient number, since it is larger than the sum of its proper divisors (5635).

61853 is a wasteful number, since it uses less digits than its factorization.

61853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634.

The product of its digits is 720, while the sum is 23.

The square root of 61853 is about 248.7026336813. The cubic root of 61853 is about 39.5476112317.

The spelling of 61853 in words is "sixty-one thousand, eight hundred fifty-three".