85969789 has 4 divisors (see below), whose sum is σ = 88743040. Its totient is φ = 83196540.

The previous prime is 85969781. The next prime is 85969811. The reversal of 85969789 is 98796958.

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 85969789 - 2³ = 85969781 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 (85969781) 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, 1386579 + ... + 1386640.

It is an arithmetic number, because the mean of its divisors is an integer number (22185760).

Almost surely, 2^85969789 is an apocalyptic number.

It is an amenable number.

85969789 is a deficient number, since it is larger than the sum of its proper divisors (2773251).

85969789 is a wasteful number, since it uses less digits than its factorization.

85969789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773250.

The product of its digits is 9797760, while the sum is 61.

The square root of 85969789 is about 9271.9894844634. The cubic root of 85969789 is about 441.3488035613.

The spelling of 85969789 in words is "eighty-five million, nine hundred sixty-nine thousand, seven hundred eighty-nine".