394143424341493 has 4 divisors (see below), whose sum is σ = 394502716434060. Its totient is φ = 393784132248928.

The previous prime is 394143424341473. The next prime is 394143424341517.

394143424341493 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70051509823684 + 324091914517809 = 8369678^2 + 18002553^2 .

It is a cyclic number.

It is not a de Polignac number, because 394143424341493 - 2³⁷ = 394005985388021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394143424341463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179646044638 + ... + 179646046831.

It is an arithmetic number, because the mean of its divisors is an integer number (98625679108515).

Almost surely, 2^{394143424341493} is an apocalyptic number.

It is an amenable number.

394143424341493 is a deficient number, since it is larger than the sum of its proper divisors (359292092567).

394143424341493 is a wasteful number, since it uses less digits than its factorization.

394143424341493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359292092566.

The product of its digits is 53747712, while the sum is 58.

The spelling of 394143424341493 in words is "three hundred ninety-four trillion, one hundred forty-three billion, four hundred twenty-four million, three hundred forty-one thousand, four hundred ninety-three".