85710409 has 4 divisors (see below), whose sum is σ = 85989904. Its totient is φ = 85430916.

The previous prime is 85710371. The next prime is 85710431. The reversal of 85710409 is 90401758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85710409 - 2¹¹ = 85708361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85710479) 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, 139287 + ... + 139900.

It is an arithmetic number, because the mean of its divisors is an integer number (21497476).

Almost surely, 2^85710409 is an apocalyptic number.

It is an amenable number.

85710409 is a deficient number, since it is larger than the sum of its proper divisors (279495).

85710409 is a wasteful number, since it uses less digits than its factorization.

85710409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279494.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 85710409 is about 9257.9916288577. The cubic root of 85710409 is about 440.9044909828.

The spelling of 85710409 in words is "eighty-five million, seven hundred ten thousand, four hundred nine".