394564361903 has 4 divisors (see below), whose sum is σ = 394616985000. Its totient is φ = 394511738808.

The previous prime is 394564361839. The next prime is 394564361951. The reversal of 394564361903 is 309163465493.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 394564361903 - 2⁶ = 394564361839 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 (394564361953) 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, 26300300 + ... + 26315297.

It is an arithmetic number, because the mean of its divisors is an integer number (98654246250).

Almost surely, 2^394564361903 is an apocalyptic number.

394564361903 is a deficient number, since it is larger than the sum of its proper divisors (52623097).

394564361903 is an equidigital number, since it uses as much as digits as its factorization.

394564361903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52623096.

The product of its (nonzero) digits is 6298560, while the sum is 53.

The spelling of 394564361903 in words is "three hundred ninety-four billion, five hundred sixty-four million, three hundred sixty-one thousand, nine hundred three".