1319981603 has 4 divisors (see below), whose sum is σ = 1365498240. Its totient is φ = 1274464968.

The previous prime is 1319981573. The next prime is 1319981629. The reversal of 1319981603 is 3061899131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3061899131 = 1223 ⋅2503597.

It is a cyclic number.

It is not a de Polignac number, because 1319981603 - 2¹⁸ = 1319719459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1319981653) 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, 22758275 + ... + 22758332.

It is an arithmetic number, because the mean of its divisors is an integer number (341374560).

Almost surely, 2^1319981603 is an apocalyptic number.

1319981603 is a deficient number, since it is larger than the sum of its proper divisors (45516637).

1319981603 is an equidigital number, since it uses as much as digits as its factorization.

1319981603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45516636.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1319981603 is about 36331.5510679079. The cubic root of 1319981603 is about 1096.9562143019.

The spelling of 1319981603 in words is "one billion, three hundred nineteen million, nine hundred eighty-one thousand, six hundred three".