394893429509 has 8 divisors (see below), whose sum is σ = 415683707040. Its totient is φ = 374103793296.

The previous prime is 394893429503. The next prime is 394893429517. The reversal of 394893429509 is 905924398493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394893429509 - 2²⁴ = 394876652293 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 (394893429503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1598327 + ... + 1828779.

It is an arithmetic number, because the mean of its divisors is an integer number (51960463380).

Almost surely, 2^394893429509 is an apocalyptic number.

It is an amenable number.

394893429509 is a deficient number, since it is larger than the sum of its proper divisors (20790277531).

394893429509 is a wasteful number, since it uses less digits than its factorization.

394893429509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320659.

The product of its (nonzero) digits is 75582720, while the sum is 65.

The spelling of 394893429509 in words is "three hundred ninety-four billion, eight hundred ninety-three million, four hundred twenty-nine thousand, five hundred nine".