1399106503 has 4 divisors (see below), whose sum is σ = 1399201128. Its totient is φ = 1399011880.

The previous prime is 1399106497. The next prime is 1399106521. The reversal of 1399106503 is 3056019931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3056019931 = 283 ⋅10798657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399106503 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 (1399106543) 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, 19801 + ... + 56482.

It is an arithmetic number, because the mean of its divisors is an integer number (349800282).

Almost surely, 2^1399106503 is an apocalyptic number.

1399106503 is a deficient number, since it is larger than the sum of its proper divisors (94625).

1399106503 is an equidigital number, since it uses as much as digits as its factorization.

1399106503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94624.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 1399106503 is about 37404.6321061978. The cubic root of 1399106503 is about 1118.4509044791.

The spelling of 1399106503 in words is "one billion, three hundred ninety-nine million, one hundred six thousand, five hundred three".