85534391 has 2 divisors, whose sum is σ = 85534392. Its totient is φ = 85534390.

The previous prime is 85534381. The next prime is 85534441. The reversal of 85534391 is 19343558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85534391 is a prime.

It is a super-2 number, since 2×85534391² = 14632264087481762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85534331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42767195 + 42767196.

It is an arithmetic number, because the mean of its divisors is an integer number (42767196).

Almost surely, 2^85534391 is an apocalyptic number.

85534391 is a deficient number, since it is larger than the sum of its proper divisors (1).

85534391 is an equidigital number, since it uses as much as digits as its factorization.

85534391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 85534391 is about 9248.4804697853. The cubic root of 85534391 is about 440.6024649944.

The spelling of 85534391 in words is "eighty-five million, five hundred thirty-four thousand, three hundred ninety-one".