394197049 has 2 divisors, whose sum is σ = 394197050. Its totient is φ = 394197048.

The previous prime is 394197031. The next prime is 394197053. The reversal of 394197049 is 940791493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273307024 + 120890025 = 16532^2 + 10995^2 .

It is an emirp because it is prime and its reverse (940791493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394197049 - 2⁵ = 394197017 is a prime.

It is not a weakly prime, because it can be changed into another prime (394197019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197098524 + 197098525.

It is an arithmetic number, because the mean of its divisors is an integer number (197098525).

Almost surely, 2^394197049 is an apocalyptic number.

It is an amenable number.

394197049 is a deficient number, since it is larger than the sum of its proper divisors (1).

394197049 is an equidigital number, since it uses as much as digits as its factorization.

394197049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 394197049 is about 19854.3962134334. The cubic root of 394197049 is about 733.2258869898.

The spelling of 394197049 in words is "three hundred ninety-four million, one hundred ninety-seven thousand, forty-nine".