85377791 has 8 divisors (see below), whose sum is σ = 90550224. Its totient is φ = 80222080.

The previous prime is 85377781. The next prime is 85377797. The reversal of 85377791 is 19777358.

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 85377791 - 2¹⁸ = 85115647 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 (85377797) 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, 7256 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (11318778).

Almost surely, 2^85377791 is an apocalyptic number.

85377791 is a deficient number, since it is larger than the sum of its proper divisors (5172433).

85377791 is a wasteful number, since it uses less digits than its factorization.

85377791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8361.

The product of its digits is 370440, while the sum is 47.

The square root of 85377791 is about 9240.0103354921. The cubic root of 85377791 is about 440.3334094856. Note that the first 3 decimals are identical.

It can be divided in two parts, 85377 and 791, that added together give a palindrome (86168).

The spelling of 85377791 in words is "eighty-five million, three hundred seventy-seven thousand, seven hundred ninety-one".