394444444469 has 2 divisors, whose sum is σ = 394444444470. Its totient is φ = 394444444468.

The previous prime is 394444444463. The next prime is 394444444517. The reversal of 394444444469 is 964444444493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217445016100 + 176999428369 = 466310^2 + 420713^2 .

It is an emirp because it is prime and its reverse (964444444493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394444444469 - 2⁴ = 394444444453 is a prime.

It is a super-2 number, since 2×394444444469² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394444444463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197222222234 + 197222222235.

It is an arithmetic number, because the mean of its divisors is an integer number (197222222235).

Almost surely, 2^394444444469 is an apocalyptic number.

It is an amenable number.

394444444469 is a deficient number, since it is larger than the sum of its proper divisors (1).

394444444469 is an equidigital number, since it uses as much as digits as its factorization.

394444444469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95551488, while the sum is 59.

The spelling of 394444444469 in words is "three hundred ninety-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred sixty-nine".