859023493 has 2 divisors, whose sum is σ = 859023494. Its totient is φ = 859023492.

The previous prime is 859023491. The next prime is 859023509. The reversal of 859023493 is 394320958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817845604 + 41177889 = 28598^2 + 6417^2 .

It is a cyclic number.

It is not a de Polignac number, because 859023493 - 2¹ = 859023491 is a prime.

Together with 859023491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859023491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429511746 + 429511747.

It is an arithmetic number, because the mean of its divisors is an integer number (429511747).

Almost surely, 2^859023493 is an apocalyptic number.

It is an amenable number.

859023493 is a deficient number, since it is larger than the sum of its proper divisors (1).

859023493 is an equidigital number, since it uses as much as digits as its factorization.

859023493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 859023493 is about 29309.1025621734. The cubic root of 859023493 is about 950.6084718731.

The spelling of 859023493 in words is "eight hundred fifty-nine million, twenty-three thousand, four hundred ninety-three".