85871761 has 4 divisors (see below), whose sum is σ = 86106112. Its totient is φ = 85637412.

The previous prime is 85871759. The next prime is 85871789. The reversal of 85871761 is 16717858.

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 85871761 - 2¹ = 85871759 is a prime.

It is a super-2 number, since 2×85871761² = 14747918674482242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85871161) 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, 116625 + ... + 117358.

It is an arithmetic number, because the mean of its divisors is an integer number (21526528).

Almost surely, 2^85871761 is an apocalyptic number.

It is an amenable number.

85871761 is a deficient number, since it is larger than the sum of its proper divisors (234351).

85871761 is a wasteful number, since it uses less digits than its factorization.

85871761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234350.

The product of its digits is 94080, while the sum is 43.

The square root of 85871761 is about 9266.7017325476. The cubic root of 85871761 is about 441.1809888140.

The spelling of 85871761 in words is "eighty-five million, eight hundred seventy-one thousand, seven hundred sixty-one".