85581007 has 2 divisors, whose sum is σ = 85581008. Its totient is φ = 85581006.

The previous prime is 85580993. The next prime is 85581011. The reversal of 85581007 is 70018558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85581007 - 2¹¹ = 85578959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85581017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42790503 + 42790504.

It is an arithmetic number, because the mean of its divisors is an integer number (42790504).

Almost surely, 2^85581007 is an apocalyptic number.

85581007 is a deficient number, since it is larger than the sum of its proper divisors (1).

85581007 is an equidigital number, since it uses as much as digits as its factorization.

85581007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 85581007 is about 9251.0003242893. Note that the first 3 decimals coincide. The cubic root of 85581007 is about 440.6824928216.

The spelling of 85581007 in words is "eighty-five million, five hundred eighty-one thousand, seven".