399354407 has 8 divisors (see below), whose sum is σ = 420563760. Its totient is φ = 378164160.

The previous prime is 399354383. The next prime is 399354409. The reversal of 399354407 is 704453993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399354407 - 2¹⁶ = 399288871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399354409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62723 + ... + 68795.

It is an arithmetic number, because the mean of its divisors is an integer number (52570470).

Almost surely, 2^399354407 is an apocalyptic number.

399354407 is a deficient number, since it is larger than the sum of its proper divisors (21209353).

399354407 is a wasteful number, since it uses less digits than its factorization.

399354407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9553.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 399354407 is about 19983.8536573905. The cubic root of 399354407 is about 736.4096887859.

The spelling of 399354407 in words is "three hundred ninety-nine million, three hundred fifty-four thousand, four hundred seven".