85074491 has 2 divisors, whose sum is σ = 85074492. Its totient is φ = 85074490.

The previous prime is 85074469. The next prime is 85074499. The reversal of 85074491 is 19447058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85074491 - 2¹⁸ = 84812347 is a prime.

It is a Sophie Germain prime.

It is equal to p_4947752 and since 85074491 and 4947752 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85074499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42537245 + 42537246.

It is an arithmetic number, because the mean of its divisors is an integer number (42537246).

Almost surely, 2^85074491 is an apocalyptic number.

85074491 is a deficient number, since it is larger than the sum of its proper divisors (1).

85074491 is an equidigital number, since it uses as much as digits as its factorization.

85074491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 85074491 is about 9223.5834142702. The cubic root of 85074491 is about 439.8113705918.

The spelling of 85074491 in words is "eighty-five million, seventy-four thousand, four hundred ninety-one".