1379121769 has 8 divisors (see below), whose sum is σ = 1444859648. Its totient is φ = 1314712080.

The previous prime is 1379121749. The next prime is 1379121811. The reversal of 1379121769 is 9671219731.

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 1379121769 - 2²⁵ = 1345567337 is a prime.

It is a super-2 number, since 2×1379121769² = 3803953707459378722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379121739) 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, 329922 + ... + 334075.

It is an arithmetic number, because the mean of its divisors is an integer number (180607456).

Almost surely, 2^1379121769 is an apocalyptic number.

It is an amenable number.

1379121769 is a deficient number, since it is larger than the sum of its proper divisors (65737879).

1379121769 is an equidigital number, since it uses as much as digits as its factorization.

1379121769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664095.

The product of its digits is 142884, while the sum is 46.

The square root of 1379121769 is about 37136.5287688551. The cubic root of 1379121769 is about 1113.1000559350.

The spelling of 1379121769 in words is "one billion, three hundred seventy-nine million, one hundred twenty-one thousand, seven hundred sixty-nine".