85190591 has 2 divisors, whose sum is σ = 85190592. Its totient is φ = 85190590.

The previous prime is 85190569. The next prime is 85190627. The reversal of 85190591 is 19509158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85190591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85190561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595295 + 42595296.

It is an arithmetic number, because the mean of its divisors is an integer number (42595296).

Almost surely, 2^85190591 is an apocalyptic number.

85190591 is a deficient number, since it is larger than the sum of its proper divisors (1).

85190591 is an equidigital number, since it uses as much as digits as its factorization.

85190591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 85190591 is about 9229.8749178957. The cubic root of 85190591 is about 440.0113478478.

The spelling of 85190591 in words is "eighty-five million, one hundred ninety thousand, five hundred ninety-one".