399467493 has 12 divisors (see below), whose sum is σ = 577182060. Its totient is φ = 266231616.

The previous prime is 399467483. The next prime is 399467527. The reversal of 399467493 is 394764993.

399467493 is a `hidden beast` number, since 3 + 9 + 94 + 67 + 493 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 321198084 + 78269409 = 17922^2 + 8847^2 .

It is not a de Polignac number, because 399467493 - 2¹² = 399463397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399467443) 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 in 11 ways as a sum of consecutive naturals, for example, 53455 + ... + 60467.

It is an arithmetic number, because the mean of its divisors is an integer number (48098505).

Almost surely, 2^399467493 is an apocalyptic number.

It is an amenable number.

399467493 is a deficient number, since it is larger than the sum of its proper divisors (177714567).

399467493 is a wasteful number, since it uses less digits than its factorization.

399467493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13348 (or 13345 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 54.

The square root of 399467493 is about 19986.6828913654. The cubic root of 399467493 is about 736.4791924358.

The spelling of 399467493 in words is "three hundred ninety-nine million, four hundred sixty-seven thousand, four hundred ninety-three".