85891519 has 4 divisors (see below), whose sum is σ = 98161744. Its totient is φ = 73621296.

The previous prime is 85891517. The next prime is 85891523. The reversal of 85891519 is 91519858.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85891519 - 2¹ = 85891517 is a prime.

It is a super-2 number, since 2×85891519² = 14754706072254722, 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 (85891517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135102 + ... + 6135115.

It is an arithmetic number, because the mean of its divisors is an integer number (24540436).

Almost surely, 2^85891519 is an apocalyptic number.

85891519 is a deficient number, since it is larger than the sum of its proper divisors (12270225).

85891519 is a wasteful number, since it uses less digits than its factorization.

85891519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12270224.

The product of its digits is 129600, while the sum is 46.

The square root of 85891519 is about 9267.7677463346. The cubic root of 85891519 is about 441.2148229306.

The spelling of 85891519 in words is "eighty-five million, eight hundred ninety-one thousand, five hundred nineteen".