394297249 has 2 divisors, whose sum is σ = 394297250. Its totient is φ = 394297248.

The previous prime is 394297243. The next prime is 394297261. The reversal of 394297249 is 942792493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382906624 + 11390625 = 19568^2 + 3375^2 .

It is an emirp because it is prime and its reverse (942792493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394297249 - 2⁵ = 394297217 is a prime.

It is not a weakly prime, because it can be changed into another prime (394297243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197148624 + 197148625.

It is an arithmetic number, because the mean of its divisors is an integer number (197148625).

Almost surely, 2^394297249 is an apocalyptic number.

It is an amenable number.

394297249 is a deficient number, since it is larger than the sum of its proper divisors (1).

394297249 is an equidigital number, since it uses as much as digits as its factorization.

394297249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 394297249 is about 19856.9194237173. The cubic root of 394297249 is about 733.2880073684.

The spelling of 394297249 in words is "three hundred ninety-four million, two hundred ninety-seven thousand, two hundred forty-nine".