394052489 has 2 divisors, whose sum is σ = 394052490. Its totient is φ = 394052488.

The previous prime is 394052471. The next prime is 394052507. The reversal of 394052489 is 984250493.

It is a balanced prime because it is at equal distance from previous prime (394052471) and next prime (394052507).

It can be written as a sum of positive squares in only one way, i.e., 279391225 + 114661264 = 16715^2 + 10708^2 .

It is a cyclic number.

It is not a de Polignac number, because 394052489 - 2⁸ = 394052233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (394052389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197026244 + 197026245.

It is an arithmetic number, because the mean of its divisors is an integer number (197026245).

Almost surely, 2^394052489 is an apocalyptic number.

It is an amenable number.

394052489 is a deficient number, since it is larger than the sum of its proper divisors (1).

394052489 is an equidigital number, since it uses as much as digits as its factorization.

394052489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 394052489 is about 19850.7553760556. The cubic root of 394052489 is about 733.1362464628.

The spelling of 394052489 in words is "three hundred ninety-four million, fifty-two thousand, four hundred eighty-nine".