864234847203493 has 2 divisors, whose sum is σ = 864234847203494. Its totient is φ = 864234847203492.

The previous prime is 864234847203451. The next prime is 864234847203557. The reversal of 864234847203493 is 394302748432468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764648478589284 + 99586368614209 = 27652278^2 + 9979297^2 .

It is a cyclic number.

It is not a de Polignac number, because 864234847203493 - 2¹³ = 864234847195301 is a prime.

It is a super-2 number, since 2×864234847203493² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864234847203433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432117423601746 + 432117423601747.

It is an arithmetic number, because the mean of its divisors is an integer number (432117423601747).

Almost surely, 2^{864234847203493} is an apocalyptic number.

It is an amenable number.

864234847203493 is a deficient number, since it is larger than the sum of its proper divisors (1).

864234847203493 is an equidigital number, since it uses as much as digits as its factorization.

864234847203493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 668860416, while the sum is 67.

The spelling of 864234847203493 in words is "eight hundred sixty-four trillion, two hundred thirty-four billion, eight hundred forty-seven million, two hundred three thousand, four hundred ninety-three".