85437659 has 2 divisors, whose sum is σ = 85437660. Its totient is φ = 85437658.

The previous prime is 85437647. The next prime is 85437679. The reversal of 85437659 is 95673458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85437659 - 2²⁰ = 84389083 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (85437679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42718829 + 42718830.

It is an arithmetic number, because the mean of its divisors is an integer number (42718830).

Almost surely, 2^85437659 is an apocalyptic number.

85437659 is a deficient number, since it is larger than the sum of its proper divisors (1).

85437659 is an equidigital number, since it uses as much as digits as its factorization.

85437659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 85437659 is about 9243.2493745436. The cubic root of 85437659 is about 440.4363079127.

The spelling of 85437659 in words is "eighty-five million, four hundred thirty-seven thousand, six hundred fifty-nine".