399553 has 8 divisors (see below), whose sum is σ = 498240. Its totient is φ = 311280.

The previous prime is 399541. The next prime is 399557. The reversal of 399553 is 355993.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399553 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 (399557) 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, 2518 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (62280).

2³⁹⁹⁵⁵³ is an apocalyptic number.

It is an amenable number.

399553 is a deficient number, since it is larger than the sum of its proper divisors (98687).

399553 is a wasteful number, since it uses less digits than its factorization.

399553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207.

The product of its digits is 18225, while the sum is 34.

The square root of 399553 is about 632.1020487231. The cubic root of 399553 is about 73.6531737081.

The spelling of 399553 in words is "three hundred ninety-nine thousand, five hundred fifty-three".