399371 has 8 divisors (see below), whose sum is σ = 464640. Its totient is φ = 336168.

The previous prime is 399353. The next prime is 399379. The reversal of 399371 is 173993.

It is a happy number.

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

It is not a de Polignac number, because 399371 - 2¹⁰ = 398347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71 + ... + 896.

It is an arithmetic number, because the mean of its divisors is an integer number (58080).

2³⁹⁹³⁷¹ is an apocalyptic number.

399371 is a deficient number, since it is larger than the sum of its proper divisors (65269).

399371 is an equidigital number, since it uses as much as digits as its factorization.

399371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033.

The product of its digits is 5103, while the sum is 32.

The square root of 399371 is about 631.9580682292. The cubic root of 399371 is about 73.6419887811.

The spelling of 399371 in words is "three hundred ninety-nine thousand, three hundred seventy-one".