394320142043939 has 2 divisors, whose sum is σ = 394320142043940. Its totient is φ = 394320142043938.

The previous prime is 394320142043897. The next prime is 394320142044041. The reversal of 394320142043939 is 939340241023493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394320142043939 - 2¹² = 394320142039843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (394320144043939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197160071021969 + 197160071021970.

It is an arithmetic number, because the mean of its divisors is an integer number (197160071021970).

Almost surely, 2^{394320142043939} is an apocalyptic number.

394320142043939 is a deficient number, since it is larger than the sum of its proper divisors (1).

394320142043939 is an equidigital number, since it uses as much as digits as its factorization.

394320142043939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 56.

The spelling of 394320142043939 in words is "three hundred ninety-four trillion, three hundred twenty billion, one hundred forty-two million, forty-three thousand, nine hundred thirty-nine".