85782787 has 4 divisors (see below), whose sum is σ = 85928040. Its totient is φ = 85637536.

The previous prime is 85782773. The next prime is 85782791. The reversal of 85782787 is 78728758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78728758 = 2 ⋅39364379.

It is a cyclic number.

It is not a de Polignac number, because 85782787 - 2⁷ = 85782659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85782757) 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, 71737 + ... + 72922.

It is an arithmetic number, because the mean of its divisors is an integer number (21482010).

Almost surely, 2^85782787 is an apocalyptic number.

85782787 is a deficient number, since it is larger than the sum of its proper divisors (145253).

85782787 is a wasteful number, since it uses less digits than its factorization.

85782787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145252.

The product of its digits is 1756160, while the sum is 52.

The square root of 85782787 is about 9261.8997511310. The cubic root of 85782787 is about 441.0285630655.

The spelling of 85782787 in words is "eighty-five million, seven hundred eighty-two thousand, seven hundred eighty-seven".