85248391 has 2 divisors, whose sum is σ = 85248392. Its totient is φ = 85248390.

The previous prime is 85248379. The next prime is 85248437. The reversal of 85248391 is 19384258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85248391 - 2⁹ = 85247879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85248311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42624195 + 42624196.

It is an arithmetic number, because the mean of its divisors is an integer number (42624196).

Almost surely, 2^85248391 is an apocalyptic number.

85248391 is a deficient number, since it is larger than the sum of its proper divisors (1).

85248391 is an equidigital number, since it uses as much as digits as its factorization.

85248391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 85248391 is about 9233.0055236635. The cubic root of 85248391 is about 440.1108381238.

The spelling of 85248391 in words is "eighty-five million, two hundred forty-eight thousand, three hundred ninety-one".