399101803 has 4 divisors (see below), whose sum is σ = 403053408. Its totient is φ = 395150200.

The previous prime is 399101789. The next prime is 399101827. The reversal of 399101803 is 308101993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399101803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399104803) 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, 1975651 + ... + 1975852.

It is an arithmetic number, because the mean of its divisors is an integer number (100763352).

Almost surely, 2^399101803 is an apocalyptic number.

399101803 is a deficient number, since it is larger than the sum of its proper divisors (3951605).

399101803 is a wasteful number, since it uses less digits than its factorization.

399101803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951604.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 399101803 is about 19977.5324552358. The cubic root of 399101803 is about 736.2543887444.

The spelling of 399101803 in words is "three hundred ninety-nine million, one hundred one thousand, eight hundred three".