85809799 has 8 divisors (see below), whose sum is σ = 87196032. Its totient is φ = 84432120.

The previous prime is 85809793. The next prime is 85809817. The reversal of 85809799 is 99790858.

85809799 = T₇₅₆₂ + T₇₅₆₃ + T₇₅₆₄.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85809799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85809793) 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, 19864 + ... + 23794.

It is an arithmetic number, because the mean of its divisors is an integer number (10899504).

Almost surely, 2^85809799 is an apocalyptic number.

85809799 is the 7564-th centered triangular number.

85809799 is a deficient number, since it is larger than the sum of its proper divisors (1386233).

85809799 is a wasteful number, since it uses less digits than its factorization.

85809799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 85809799 is about 9263.3578685054. The cubic root of 85809799 is about 441.0748497925.

The spelling of 85809799 in words is "eighty-five million, eight hundred nine thousand, seven hundred ninety-nine".