85861961 has 8 divisors (see below), whose sum is σ = 87696000. Its totient is φ = 84035952.

The previous prime is 85861939. The next prime is 85861987. The reversal of 85861961 is 16916858.

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

It is not a de Polignac number, because 85861961 - 2¹⁸ = 85599817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85861991) 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, 22790 + ... + 26288.

It is an arithmetic number, because the mean of its divisors is an integer number (10962000).

Almost surely, 2^85861961 is an apocalyptic number.

It is an amenable number.

85861961 is a deficient number, since it is larger than the sum of its proper divisors (1834039).

85861961 is a wasteful number, since it uses less digits than its factorization.

85861961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015.

The product of its digits is 103680, while the sum is 44.

The square root of 85861961 is about 9266.1729424828. The cubic root of 85861961 is about 441.1642051119.

The spelling of 85861961 in words is "eighty-five million, eight hundred sixty-one thousand, nine hundred sixty-one".