85237649 has 12 divisors (see below), whose sum is σ = 99682944. Its totient is φ = 71365872.

The previous prime is 85237613. The next prime is 85237651. The reversal of 85237649 is 94673258.

It is not a de Polignac number, because 85237649 - 2⁸ = 85237393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85237549) 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 11 ways as a sum of consecutive naturals, for example, 167207 + ... + 167715.

It is an arithmetic number, because the mean of its divisors is an integer number (8306912).

Almost surely, 2^85237649 is an apocalyptic number.

It is an amenable number.

85237649 is a deficient number, since it is larger than the sum of its proper divisors (14445295).

85237649 is an frugal number, since it uses more digits than its factorization.

85237649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 563 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 85237649 is about 9232.4237879335. The cubic root of 85237649 is about 440.0923514828.

The spelling of 85237649 in words is "eighty-five million, two hundred thirty-seven thousand, six hundred forty-nine".