85237549 has 2 divisors, whose sum is σ = 85237550. Its totient is φ = 85237548.

The previous prime is 85237519. The next prime is 85237561. The reversal of 85237549 is 94573258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84824100 + 413449 = 9210^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 85237549 - 2¹⁵ = 85204781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85237519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42618774 + 42618775.

It is an arithmetic number, because the mean of its divisors is an integer number (42618775).

Almost surely, 2^85237549 is an apocalyptic number.

It is an amenable number.

85237549 is a deficient number, since it is larger than the sum of its proper divisors (1).

85237549 is an equidigital number, since it uses as much as digits as its factorization.

85237549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 85237549 is about 9232.4183722360. The cubic root of 85237549 is about 440.0921793787.

The spelling of 85237549 in words is "eighty-five million, two hundred thirty-seven thousand, five hundred forty-nine".