85672861 has 4 divisors (see below), whose sum is σ = 89397792. Its totient is φ = 81947932.

The previous prime is 85672841. The next prime is 85672901. The reversal of 85672861 is 16827658.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16827658 = 2 ⋅8413829.

It is a cyclic number.

It is not a de Polignac number, because 85672861 - 2⁷ = 85672733 is a prime.

It is a super-2 number, since 2×85672861² = 14679678223850642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85672831) 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, 1862431 + ... + 1862476.

It is an arithmetic number, because the mean of its divisors is an integer number (22349448).

Almost surely, 2^85672861 is an apocalyptic number.

It is an amenable number.

85672861 is a deficient number, since it is larger than the sum of its proper divisors (3724931).

85672861 is a wasteful number, since it uses less digits than its factorization.

85672861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724930.

The product of its digits is 161280, while the sum is 43.

The square root of 85672861 is about 9255.9635370933. The cubic root of 85672861 is about 440.8400977931.

The spelling of 85672861 in words is "eighty-five million, six hundred seventy-two thousand, eight hundred sixty-one".