1379121299 has 4 divisors (see below), whose sum is σ = 1379205864. Its totient is φ = 1379036736.

The previous prime is 1379121287. The next prime is 1379121307. The reversal of 1379121299 is 9921219731.

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.

It is a cyclic number.

It is not a de Polignac number, because 1379121299 - 2²⁰ = 1378072723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379121259) 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, 9182 + ... + 53315.

It is an arithmetic number, because the mean of its divisors is an integer number (344801466).

Almost surely, 2^1379121299 is an apocalyptic number.

1379121299 is a deficient number, since it is larger than the sum of its proper divisors (84565).

1379121299 is an equidigital number, since it uses as much as digits as its factorization.

1379121299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84564.

The product of its digits is 61236, while the sum is 44.

The square root of 1379121299 is about 37136.5224408533. The cubic root of 1379121299 is about 1113.0999294881.

The spelling of 1379121299 in words is "one billion, three hundred seventy-nine million, one hundred twenty-one thousand, two hundred ninety-nine".