85151449 has 2 divisors, whose sum is σ = 85151450. Its totient is φ = 85151448.

The previous prime is 85151413. The next prime is 85151471. The reversal of 85151449 is 94415158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75134224 + 10017225 = 8668^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 85151449 - 2¹¹ = 85149401 is a prime.

It is not a weakly prime, because it can be changed into another prime (85251449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42575724 + 42575725.

It is an arithmetic number, because the mean of its divisors is an integer number (42575725).

Almost surely, 2^85151449 is an apocalyptic number.

It is an amenable number.

85151449 is a deficient number, since it is larger than the sum of its proper divisors (1).

85151449 is an equidigital number, since it uses as much as digits as its factorization.

85151449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 37.

The square root of 85151449 is about 9227.7542771793. The cubic root of 85151449 is about 439.9439477495.

The spelling of 85151449 in words is "eighty-five million, one hundred fifty-one thousand, four hundred forty-nine".