399127 has 4 divisors (see below), whose sum is σ = 412920. Its totient is φ = 385336.

The previous prime is 399107. The next prime is 399131. The reversal of 399127 is 721993.

399127 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 721993 = 23 ⋅31391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399127 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6853 + ... + 6910.

It is an arithmetic number, because the mean of its divisors is an integer number (103230).

2³⁹⁹¹²⁷ is an apocalyptic number.

399127 is a deficient number, since it is larger than the sum of its proper divisors (13793).

399127 is a wasteful number, since it uses less digits than its factorization.

399127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792.

The product of its digits is 3402, while the sum is 31.

The square root of 399127 is about 631.7649879504. The cubic root of 399127 is about 73.6269882712.

The spelling of 399127 in words is "three hundred ninety-nine thousand, one hundred twenty-seven".