1379289817 has 4 divisors (see below), whose sum is σ = 1379387776. Its totient is φ = 1379191860.

The previous prime is 1379289809. The next prime is 1379289839. The reversal of 1379289817 is 7189829731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 1379289817 - 2³ = 1379289809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379289017) 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, 23409 + ... + 57502.

It is an arithmetic number, because the mean of its divisors is an integer number (344846944).

Almost surely, 2^1379289817 is an apocalyptic number.

It is an amenable number.

1379289817 is a deficient number, since it is larger than the sum of its proper divisors (97959).

1379289817 is an equidigital number, since it uses as much as digits as its factorization.

1379289817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97958.

The product of its digits is 1524096, while the sum is 55.

The square root of 1379289817 is about 37138.7912700454. The cubic root of 1379289817 is about 1113.1452650541.

The spelling of 1379289817 in words is "one billion, three hundred seventy-nine million, two hundred eighty-nine thousand, eight hundred seventeen".