399053 has 4 divisors (see below), whose sum is σ = 408828. Its totient is φ = 389280.

The previous prime is 399043. The next prime is 399059. The reversal of 399053 is 350993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350993 = 373 ⋅941.

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 228484 = 413^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 399053 - 2⁶ = 398989 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 (399059) 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, 4826 + ... + 4907.

It is an arithmetic number, because the mean of its divisors is an integer number (102207).

2³⁹⁹⁰⁵³ is an apocalyptic number.

It is an amenable number.

399053 is a deficient number, since it is larger than the sum of its proper divisors (9775).

399053 is an equidigital number, since it uses as much as digits as its factorization.

399053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774.

The product of its (nonzero) digits is 3645, while the sum is 29.

The square root of 399053 is about 631.7064191537. The cubic root of 399053 is about 73.6224377281.

The spelling of 399053 in words is "three hundred ninety-nine thousand, fifty-three".