537861 has 4 divisors (see below), whose sum is σ = 717152. Its totient is φ = 358572.

The previous prime is 537853. The next prime is 537877. The reversal of 537861 is 168735.

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 not a de Polignac number, because 537861 - 2³ = 537853 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89641 + ... + 89646.

It is an arithmetic number, because the mean of its divisors is an integer number (179288).

537861 is a Friedman number, since it can be written as 37+(8+6)^(5*1), using all its digits and the basic arithmetic operations.

2⁵³⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

537861 is a deficient number, since it is larger than the sum of its proper divisors (179291).

537861 is a wasteful number, since it uses less digits than its factorization.

537861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179290.

The product of its digits is 5040, while the sum is 30.

The square root of 537861 is about 733.3900735625. The cubic root of 537861 is about 81.3248651191.

The spelling of 537861 in words is "five hundred thirty-seven thousand, eight hundred sixty-one".