85488749 has 2 divisors, whose sum is σ = 85488750. Its totient is φ = 85488748.

The previous prime is 85488743. The next prime is 85488763. The reversal of 85488749 is 94788458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 2951524 = 9085^2 + 1718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85488749 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 85488749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85488743) 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 as a sum of consecutive naturals, namely, 42744374 + 42744375.

It is an arithmetic number, because the mean of its divisors is an integer number (42744375).

Almost surely, 2^85488749 is an apocalyptic number.

It is an amenable number.

85488749 is a deficient number, since it is larger than the sum of its proper divisors (1).

85488749 is an equidigital number, since it uses as much as digits as its factorization.

85488749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 53.

The square root of 85488749 is about 9246.0126000347. The cubic root of 85488749 is about 440.5240811011.

The spelling of 85488749 in words is "eighty-five million, four hundred eighty-eight thousand, seven hundred forty-nine".