85877509 has 8 divisors (see below), whose sum is σ = 87721920. Its totient is φ = 84046176.

The previous prime is 85877501. The next prime is 85877521. The reversal of 85877509 is 90577858.

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 85877509 - 2³ = 85877501 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 (85877501) 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, 10624 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (10965240).

Almost surely, 2^85877509 is an apocalyptic number.

It is an amenable number.

85877509 is a deficient number, since it is larger than the sum of its proper divisors (1844411).

85877509 is a wasteful number, since it uses less digits than its factorization.

85877509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 85877509 is about 9267.0118700690. The cubic root of 85877509 is about 441.1908323750.

The spelling of 85877509 in words is "eighty-five million, eight hundred seventy-seven thousand, five hundred nine".