85621861 has 8 divisors (see below), whose sum is σ = 92324960. Its totient is φ = 78935472.

The previous prime is 85621831. The next prime is 85621883. The reversal of 85621861 is 16812658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85621861 - 2⁵ = 85621829 is a prime.

It is a super-2 number, since 2×85621861² = 14662206162206642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85621861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85621831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7750 + ... + 15208.

It is an arithmetic number, because the mean of its divisors is an integer number (11540620).

Almost surely, 2^85621861 is an apocalyptic number.

It is an amenable number.

85621861 is a deficient number, since it is larger than the sum of its proper divisors (6703099).

85621861 is a wasteful number, since it uses less digits than its factorization.

85621861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355.

The product of its digits is 23040, while the sum is 37.

The square root of 85621861 is about 9253.2081463674. The cubic root of 85621861 is about 440.7526048676.

The spelling of 85621861 in words is "eighty-five million, six hundred twenty-one thousand, eight hundred sixty-one".