85263989 has 4 divisors (see below), whose sum is σ = 86343360. Its totient is φ = 84184620.

The previous prime is 85263979. The next prime is 85264019. The reversal of 85263989 is 98936258.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98936258 = 2 ⋅49468129.

It is a cyclic number.

It is not a de Polignac number, because 85263989 - 2¹² = 85259893 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 (85263929) 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, 539567 + ... + 539724.

It is an arithmetic number, because the mean of its divisors is an integer number (21585840).

Almost surely, 2^85263989 is an apocalyptic number.

It is an amenable number.

85263989 is a deficient number, since it is larger than the sum of its proper divisors (1079371).

85263989 is a wasteful number, since it uses less digits than its factorization.

85263989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079370.

The product of its digits is 933120, while the sum is 50.

The square root of 85263989 is about 9233.8501720572. The cubic root of 85263989 is about 440.1376790222.

The spelling of 85263989 in words is "eighty-five million, two hundred sixty-three thousand, nine hundred eighty-nine".