399580001 has 4 divisors (see below), whose sum is σ = 400273092. Its totient is φ = 398886912.

The previous prime is 399579997. The next prime is 399580031. The reversal of 399580001 is 100085993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398042401 + 1537600 = 19951^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 399580001 - 2² = 399579997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399580031) 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, 345680 + ... + 346833.

It is an arithmetic number, because the mean of its divisors is an integer number (100068273).

Almost surely, 2^399580001 is an apocalyptic number.

It is an amenable number.

399580001 is a deficient number, since it is larger than the sum of its proper divisors (693091).

399580001 is an equidigital number, since it uses as much as digits as its factorization.

399580001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693090.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 399580001 is about 19989.4972673152. The cubic root of 399580001 is about 736.5483278261.

The spelling of 399580001 in words is "three hundred ninety-nine million, five hundred eighty thousand, one".