399701 has 4 divisors (see below), whose sum is σ = 401292. Its totient is φ = 398112.

The previous prime is 399691. The next prime is 399719. The reversal of 399701 is 107993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 107993 = 79 ⋅1367.

It can be written as a sum of positive squares in 2 ways, for example, as 96100 + 303601 = 310^2 + 551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399701 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 (399731) 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, 326 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (100323).

2³⁹⁹⁷⁰¹ is an apocalyptic number.

It is an amenable number.

399701 is a deficient number, since it is larger than the sum of its proper divisors (1591).

399701 is a wasteful number, since it uses less digits than its factorization.

399701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 399701 is about 632.2191075885. The cubic root of 399701 is about 73.6622666395.

The spelling of 399701 in words is "three hundred ninety-nine thousand, seven hundred one".