394621249 has 4 divisors (see below), whose sum is σ = 430495920. Its totient is φ = 358746580.

The previous prime is 394621247. The next prime is 394621267. The reversal of 394621249 is 942126493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394621249 - 2¹ = 394621247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394621247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17937319 + ... + 17937340.

It is an arithmetic number, because the mean of its divisors is an integer number (107623980).

Almost surely, 2^394621249 is an apocalyptic number.

It is an amenable number.

394621249 is a deficient number, since it is larger than the sum of its proper divisors (35874671).

394621249 is a wasteful number, since it uses less digits than its factorization.

394621249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35874670.

The product of its digits is 93312, while the sum is 40.

The square root of 394621249 is about 19865.0761136221. The cubic root of 394621249 is about 733.4888036533.

The spelling of 394621249 in words is "three hundred ninety-four million, six hundred twenty-one thousand, two hundred forty-nine".