85245749 has 2 divisors, whose sum is σ = 85245750. Its totient is φ = 85245748.

The previous prime is 85245709. The next prime is 85245757. The reversal of 85245749 is 94754258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 39250225 = 6782^2 + 6265^2 .

It is a cyclic number.

It is not a de Polignac number, because 85245749 - 2⁸ = 85245493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85245709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42622874 + 42622875.

It is an arithmetic number, because the mean of its divisors is an integer number (42622875).

Almost surely, 2^85245749 is an apocalyptic number.

It is an amenable number.

85245749 is a deficient number, since it is larger than the sum of its proper divisors (1).

85245749 is an equidigital number, since it uses as much as digits as its factorization.

85245749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 85245749 is about 9232.8624488833. The cubic root of 85245749 is about 440.1062914697.

The spelling of 85245749 in words is "eighty-five million, two hundred forty-five thousand, seven hundred forty-nine".