399450170203 has 4 divisors (see below), whose sum is σ = 456514480240. Its totient is φ = 342385860168.

The previous prime is 399450170167. The next prime is 399450170209. The reversal of 399450170203 is 302071054993.

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

It is a cyclic number.

It is not a de Polignac number, because 399450170203 - 2⁹ = 399450169691 is a prime.

It is a super-2 number, since 2×399450170203² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399450170203.

It is not an unprimeable number, because it can be changed into a prime (399450170209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28532155008 + ... + 28532155021.

It is an arithmetic number, because the mean of its divisors is an integer number (114128620060).

Almost surely, 2^399450170203 is an apocalyptic number.

399450170203 is a deficient number, since it is larger than the sum of its proper divisors (57064310037).

399450170203 is an equidigital number, since it uses as much as digits as its factorization.

399450170203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57064310036.

The product of its (nonzero) digits is 204120, while the sum is 43.

The spelling of 399450170203 in words is "three hundred ninety-nine billion, four hundred fifty million, one hundred seventy thousand, two hundred three".