85861919 has 8 divisors (see below), whose sum is σ = 100872912. Its totient is φ = 72051840.

The previous prime is 85861891. The next prime is 85861939. The reversal of 85861919 is 91916858.

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 85861919 - 2¹⁶ = 85796383 is a prime.

It is a super-2 number, since 2×85861919² = 14744538268725122, 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 (85861939) 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, 300074 + ... + 300359.

It is an arithmetic number, because the mean of its divisors is an integer number (12609114).

Almost surely, 2^85861919 is an apocalyptic number.

85861919 is a deficient number, since it is larger than the sum of its proper divisors (15010993).

85861919 is a wasteful number, since it uses less digits than its factorization.

85861919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600457.

The product of its digits is 155520, while the sum is 47.

The square root of 85861919 is about 9266.1706761747. The cubic root of 85861919 is about 441.1641331790.

The spelling of 85861919 in words is "eighty-five million, eight hundred sixty-one thousand, nine hundred nineteen".