1299381599 has 8 divisors (see below), whose sum is σ = 1328203008. Its totient is φ = 1270609240.

The previous prime is 1299381581. The next prime is 1299381623. The reversal of 1299381599 is 9951839921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1299381599 - 2¹² = 1299377503 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 (1299381509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44144 + ... + 67434.

It is an arithmetic number, because the mean of its divisors is an integer number (166025376).

Almost surely, 2^1299381599 is an apocalyptic number.

1299381599 is a deficient number, since it is larger than the sum of its proper divisors (28821409).

1299381599 is a wasteful number, since it uses less digits than its factorization.

1299381599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24525.

The product of its digits is 1574640, while the sum is 56.

The square root of 1299381599 is about 36046.9360556483. The cubic root of 1299381599 is about 1091.2197996004.

The spelling of 1299381599 in words is "one billion, two hundred ninety-nine million, three hundred eighty-one thousand, five hundred ninety-nine".