85108691 has 2 divisors, whose sum is σ = 85108692. Its totient is φ = 85108690.

The previous prime is 85108687. The next prime is 85108703. The reversal of 85108691 is 19680158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85108691 - 2² = 85108687 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85107691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42554345 + 42554346.

It is an arithmetic number, because the mean of its divisors is an integer number (42554346).

Almost surely, 2^85108691 is an apocalyptic number.

85108691 is a deficient number, since it is larger than the sum of its proper divisors (1).

85108691 is an equidigital number, since it uses as much as digits as its factorization.

85108691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 85108691 is about 9225.4371712131. The cubic root of 85108691 is about 439.8702975141.

The spelling of 85108691 in words is "eighty-five million, one hundred eight thousand, six hundred ninety-one".