1319975999 has 48 divisors (see below), whose sum is σ = 1553911200. Its totient is φ = 1116758016.

The previous prime is 1319975983. The next prime is 1319976019. The reversal of 1319975999 is 9995799131.

It is a happy number.

It is not a de Polignac number, because 1319975999 - 2⁴ = 1319975983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1319975099) 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 47 ways as a sum of consecutive naturals, for example, 14831147 + ... + 14831235.

It is an arithmetic number, because the mean of its divisors is an integer number (32373150).

Almost surely, 2^1319975999 is an apocalyptic number.

1319975999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1319975999 is a deficient number, since it is larger than the sum of its proper divisors (233935201).

1319975999 is a wasteful number, since it uses less digits than its factorization.

1319975999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 235 counting only the distinct ones).

The product of its digits is 6200145, while the sum is 62.

The square root of 1319975999 is about 36331.4739447769. The cubic root of 1319975999 is about 1096.9546619189.

It can be divided in two parts, 13199 and 75999, that added together give a palindrome (89198).

The spelling of 1319975999 in words is "one billion, three hundred nineteen million, nine hundred seventy-five thousand, nine hundred ninety-nine".