399440637103 has 4 divisors (see below), whose sum is σ = 399442989960. Its totient is φ = 399438284248.

The previous prime is 399440637091. The next prime is 399440637119. The reversal of 399440637103 is 301736044993.

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-399440637103 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 (399440637203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900148 + ... + 1268521.

It is an arithmetic number, because the mean of its divisors is an integer number (99860747490).

Almost surely, 2^399440637103 is an apocalyptic number.

399440637103 is a deficient number, since it is larger than the sum of its proper divisors (2352857).

399440637103 is a wasteful number, since it uses less digits than its factorization.

399440637103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352856.

The product of its (nonzero) digits is 1469664, while the sum is 49.

The spelling of 399440637103 in words is "three hundred ninety-nine billion, four hundred forty million, six hundred thirty-seven thousand, one hundred three".