85437587 has 4 divisors (see below), whose sum is σ = 87255456. Its totient is φ = 83619720.

The previous prime is 85437577. The next prime is 85437593. The reversal of 85437587 is 78573458.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85437587 - 2¹⁰ = 85436563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1817821 = 85437587 / (8 + 5 + 4 + 3 + 7 + 5 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85437577) 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, 908864 + ... + 908957.

It is an arithmetic number, because the mean of its divisors is an integer number (21813864).

Almost surely, 2^85437587 is an apocalyptic number.

85437587 is a deficient number, since it is larger than the sum of its proper divisors (1817869).

85437587 is a wasteful number, since it uses less digits than its factorization.

85437587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817868.

The product of its digits is 940800, while the sum is 47.

The square root of 85437587 is about 9243.2454798085. The cubic root of 85437587 is about 440.4361841912.

The spelling of 85437587 in words is "eighty-five million, four hundred thirty-seven thousand, five hundred eighty-seven".