85379391 has 12 divisors (see below), whose sum is σ = 124712640. Its totient is φ = 56279520.

The previous prime is 85379383. The next prime is 85379429. The reversal of 85379391 is 19397358.

It is a happy number.

It is not a de Polignac number, because 85379391 - 2³ = 85379383 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85379351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52495 + ... + 54096.

It is an arithmetic number, because the mean of its divisors is an integer number (10392720).

Almost surely, 2^85379391 is an apocalyptic number.

85379391 is a deficient number, since it is larger than the sum of its proper divisors (39333249).

85379391 is a wasteful number, since it uses less digits than its factorization.

85379391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106686 (or 106683 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 85379391 is about 9240.0969150762. The cubic root of 85379391 is about 440.3361601192.

The spelling of 85379391 in words is "eighty-five million, three hundred seventy-nine thousand, three hundred ninety-one".