85320919 has 4 divisors (see below), whose sum is σ = 85436496. Its totient is φ = 85205344.

The previous prime is 85320863. The next prime is 85320923. The reversal of 85320919 is 91902358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91902358 = 2 ⋅45951179.

It is a cyclic number.

It is not a de Polignac number, because 85320919 - 2⁷ = 85320791 is a prime.

It is a super-2 number, since 2×85320919² = 14559318438009122, 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 (85320979) 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, 56674 + ... + 58159.

It is an arithmetic number, because the mean of its divisors is an integer number (21359124).

Almost surely, 2^85320919 is an apocalyptic number.

85320919 is a deficient number, since it is larger than the sum of its proper divisors (115577).

85320919 is a wasteful number, since it uses less digits than its factorization.

85320919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115576.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 85320919 is about 9236.9323370911. The cubic root of 85320919 is about 440.2356158873.

The spelling of 85320919 in words is "eighty-five million, three hundred twenty thousand, nine hundred nineteen".