85768991 has 8 divisors (see below), whose sum is σ = 106932864. Its totient is φ = 66832920.

The previous prime is 85768967. The next prime is 85769003. The reversal of 85768991 is 19986758.

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

It is a de Polignac number, because none of the positive numbers 2^k-85768991 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 (85768901) 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, 556865 + ... + 557018.

It is an arithmetic number, because the mean of its divisors is an integer number (13366608).

Almost surely, 2^85768991 is an apocalyptic number.

85768991 is a deficient number, since it is larger than the sum of its proper divisors (21163873).

85768991 is a wasteful number, since it uses less digits than its factorization.

85768991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113901.

The product of its digits is 1088640, while the sum is 53.

The square root of 85768991 is about 9261.1549495730. The cubic root of 85768991 is about 441.0049190203.

The spelling of 85768991 in words is "eighty-five million, seven hundred sixty-eight thousand, nine hundred ninety-one".