399607 has 8 divisors (see below), whose sum is σ = 438480. Its totient is φ = 361920.

The previous prime is 399601. The next prime is 399613. The reversal of 399607 is 706993.

It is an interprime number because it is at equal distance from previous prime (399601) and next prime (399613).

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

It is a de Polignac number, because none of the positive numbers 2^k-399607 is a prime.

It is an Ulam 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 (399601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507 + ... + 1027.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2³⁹⁹⁶⁰⁷ is an apocalyptic number.

399607 is a deficient number, since it is larger than the sum of its proper divisors (38873).

399607 is a wasteful number, since it uses less digits than its factorization.

399607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 399607 is about 632.1447619019. The cubic root of 399607 is about 73.6564916595.

The spelling of 399607 in words is "three hundred ninety-nine thousand, six hundred seven".