863761 has 4 divisors (see below), whose sum is σ = 865792. Its totient is φ = 861732.

The previous prime is 863749. The next prime is 863767. The reversal of 863761 is 167368.

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 863761 - 2⁵ = 863729 is a prime.

It is a super-3 number, since 3×863761³ = 1933312363235940243, which contains 333 as substring.

It is a Duffinian number.

863761 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (863767) 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, 105 + ... + 1318.

It is an arithmetic number, because the mean of its divisors is an integer number (216448).

2⁸⁶³⁷⁶¹ is an apocalyptic number.

It is an amenable number.

863761 is a deficient number, since it is larger than the sum of its proper divisors (2031).

863761 is a wasteful number, since it uses less digits than its factorization.

863761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030.

The product of its digits is 6048, while the sum is 31.

The square root of 863761 is about 929.3874326673. The cubic root of 863761 is about 95.2352801589.

The spelling of 863761 in words is "eight hundred sixty-three thousand, seven hundred sixty-one".