399411 has 10 divisors (see below), whose sum is σ = 596772. Its totient is φ = 266220.

The previous prime is 399409. The next prime is 399433. The reversal of 399411 is 114993.

It is not a de Polignac number, because 399411 - 2¹ = 399409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

399411 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (399401) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2385 + ... + 2546.

2³⁹⁹⁴¹¹ is an apocalyptic number.

399411 is a deficient number, since it is larger than the sum of its proper divisors (197361).

399411 is an equidigital number, since it uses as much as digits as its factorization.

399411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943 (or 4934 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 399411 is about 631.9897151062. The cubic root of 399411 is about 73.6444472981.

It can be divided in two parts, 3994 and 11, that multiplied together give a palindrome (43934).

The spelling of 399411 in words is "three hundred ninety-nine thousand, four hundred eleven".