394244069 has 4 divisors (see below), whose sum is σ = 403859820. Its totient is φ = 384628320.

The previous prime is 394244041. The next prime is 394244111. The reversal of 394244069 is 960442493.

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 76335169 + 317908900 = 8737^2 + 17830^2 .

It is a cyclic number.

It is not a de Polignac number, because 394244069 - 2²⁴ = 377466853 is a prime.

It is a super-2 number, since 2×394244069² = 310856771883353522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 9615709 = 394244069 / (3 + 9 + 4 + 2 + 4 + 4 + 0 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394244029) 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, 4807814 + ... + 4807895.

It is an arithmetic number, because the mean of its divisors is an integer number (100964955).

Almost surely, 2^394244069 is an apocalyptic number.

It is an amenable number.

394244069 is a deficient number, since it is larger than the sum of its proper divisors (9615751).

394244069 is an equidigital number, since it uses as much as digits as its factorization.

394244069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9615750.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 394244069 is about 19855.5802987473. The cubic root of 394244069 is about 733.2550390012.

The spelling of 394244069 in words is "three hundred ninety-four million, two hundred forty-four thousand, sixty-nine".