85584997 has 4 divisors (see below), whose sum is σ = 85735980. Its totient is φ = 85434016.

The previous prime is 85584973. The next prime is 85585009. The reversal of 85584997 is 79948558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79948558 = 2 ⋅39974279.

It can be written as a sum of positive squares in 2 ways, for example, as 45819361 + 39765636 = 6769^2 + 6306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85584997 is a prime.

It is a super-2 number, since 2×85584997² = 14649583422980018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85584937) 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, 74638 + ... + 75775.

It is an arithmetic number, because the mean of its divisors is an integer number (21433995).

Almost surely, 2^85584997 is an apocalyptic number.

It is an amenable number.

85584997 is a deficient number, since it is larger than the sum of its proper divisors (150983).

85584997 is a wasteful number, since it uses less digits than its factorization.

85584997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150982.

The product of its digits is 3628800, while the sum is 55.

The square root of 85584997 is about 9251.2159741301. The cubic root of 85584997 is about 440.6893412875.

The spelling of 85584997 in words is "eighty-five million, five hundred eighty-four thousand, nine hundred ninety-seven".