85464989 has 4 divisors (see below), whose sum is σ = 85604124. Its totient is φ = 85325856.

The previous prime is 85464979. The next prime is 85464997. The reversal of 85464989 is 98946458.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 73444900 = 3467^2 + 8570^2 .

It is a cyclic number.

It is not a de Polignac number, because 85464989 - 2⁸ = 85464733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85464989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85464919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68642 + ... + 69875.

It is an arithmetic number, because the mean of its divisors is an integer number (21401031).

Almost surely, 2^85464989 is an apocalyptic number.

It is an amenable number.

85464989 is a deficient number, since it is larger than the sum of its proper divisors (139135).

85464989 is a wasteful number, since it uses less digits than its factorization.

85464989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139134.

The product of its digits is 2488320, while the sum is 53.

The square root of 85464989 is about 9244.7276325482. The cubic root of 85464989 is about 440.4832655079.

The spelling of 85464989 in words is "eighty-five million, four hundred sixty-four thousand, nine hundred eighty-nine".