85250491 has 2 divisors, whose sum is σ = 85250492. Its totient is φ = 85250490.

The previous prime is 85250471. The next prime is 85250509. The reversal of 85250491 is 19405258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85250491 - 2¹⁹ = 84726203 is a prime.

It is not a weakly prime, because it can be changed into another prime (85250411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42625245 + 42625246.

It is an arithmetic number, because the mean of its divisors is an integer number (42625246).

Almost surely, 2^85250491 is an apocalyptic number.

85250491 is a deficient number, since it is larger than the sum of its proper divisors (1).

85250491 is an equidigital number, since it uses as much as digits as its factorization.

85250491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 85250491 is about 9233.1192454121. The cubic root of 85250491 is about 440.1144519757.

The spelling of 85250491 in words is "eighty-five million, two hundred fifty thousand, four hundred ninety-one".