394245949 has 2 divisors, whose sum is σ = 394245950. Its totient is φ = 394245948.

The previous prime is 394245947. The next prime is 394245961. The reversal of 394245949 is 949542493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383454724 + 10791225 = 19582^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 394245949 - 2¹ = 394245947 is a prime.

Together with 394245947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394245947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197122974 + 197122975.

It is an arithmetic number, because the mean of its divisors is an integer number (197122975).

Almost surely, 2^394245949 is an apocalyptic number.

It is an amenable number.

394245949 is a deficient number, since it is larger than the sum of its proper divisors (1).

394245949 is an equidigital number, since it uses as much as digits as its factorization.

394245949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The square root of 394245949 is about 19855.6276405456. The cubic root of 394245949 is about 733.2562045374.

The spelling of 394245949 in words is "three hundred ninety-four million, two hundred forty-five thousand, nine hundred forty-nine".