85238004091 has 2 divisors, whose sum is σ = 85238004092. Its totient is φ = 85238004090.

The previous prime is 85238004053. The next prime is 85238004101. The reversal of 85238004091 is 19040083258.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85238004091 is a prime.

It is not a weakly prime, because it can be changed into another prime (85238004391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42619002045 + 42619002046.

It is an arithmetic number, because the mean of its divisors is an integer number (42619002046).

Almost surely, 2^85238004091 is an apocalyptic number.

85238004091 is a deficient number, since it is larger than the sum of its proper divisors (1).

85238004091 is an equidigital number, since it uses as much as digits as its factorization.

85238004091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 85238004091 in words is "eighty-five billion, two hundred thirty-eight million, four thousand, ninety-one".