394242382745 has 4 divisors (see below), whose sum is σ = 473090859300. Its totient is φ = 315393906192.

The previous prime is 394242382661. The next prime is 394242382763. The reversal of 394242382745 is 547283242493.

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 270724577344 + 123517805401 = 520312^2 + 351451^2 .

It is a cyclic number.

It is not a de Polignac number, because 394242382745 - 2⁸ = 394242382489 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39424238270 + ... + 39424238279.

It is an arithmetic number, because the mean of its divisors is an integer number (118272714825).

Almost surely, 2^394242382745 is an apocalyptic number.

It is an amenable number.

394242382745 is a deficient number, since it is larger than the sum of its proper divisors (78848476555).

394242382745 is an equidigital number, since it uses as much as digits as its factorization.

394242382745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78848476554.

The product of its digits is 11612160, while the sum is 53.

The spelling of 394242382745 in words is "three hundred ninety-four billion, two hundred forty-two million, three hundred eighty-two thousand, seven hundred forty-five".