85403191 has 2 divisors, whose sum is σ = 85403192. Its totient is φ = 85403190.

The previous prime is 85403179. The next prime is 85403207. The reversal of 85403191 is 19130458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85403191 - 2⁷ = 85403063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85407191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42701595 + 42701596.

It is an arithmetic number, because the mean of its divisors is an integer number (42701596).

Almost surely, 2^85403191 is an apocalyptic number.

85403191 is a deficient number, since it is larger than the sum of its proper divisors (1).

85403191 is an equidigital number, since it uses as much as digits as its factorization.

85403191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 85403191 is about 9241.3846906186. The cubic root of 85403191 is about 440.3770717367.

The spelling of 85403191 in words is "eighty-five million, four hundred three thousand, one hundred ninety-one".