85386357493 has 2 divisors, whose sum is σ = 85386357494. Its totient is φ = 85386357492.

The previous prime is 85386357479. The next prime is 85386357547. The reversal of 85386357493 is 39475368358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83418725329 + 1967632164 = 288823^2 + 44358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85386357493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85386357443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42693178746 + 42693178747.

It is an arithmetic number, because the mean of its divisors is an integer number (42693178747).

Almost surely, 2^85386357493 is an apocalyptic number.

It is an amenable number.

85386357493 is a deficient number, since it is larger than the sum of its proper divisors (1).

85386357493 is an equidigital number, since it uses as much as digits as its factorization.

85386357493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65318400, while the sum is 61.

The spelling of 85386357493 in words is "eighty-five billion, three hundred eighty-six million, three hundred fifty-seven thousand, four hundred ninety-three".