1379942569 has 8 divisors (see below), whose sum is σ = 1445260032. Its totient is φ = 1315068480.

The previous prime is 1379942567. The next prime is 1379942573. The reversal of 1379942569 is 9652499731.

It is a happy number.

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 1379942569 - 2¹ = 1379942567 is a prime.

It is a super-2 number, since 2×1379942569² = 3808482987476639522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1379942567) 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, 104464 + ... + 116929.

It is an arithmetic number, because the mean of its divisors is an integer number (180657504).

Almost surely, 2^1379942569 is an apocalyptic number.

It is an amenable number.

1379942569 is a deficient number, since it is larger than the sum of its proper divisors (65317463).

1379942569 is a wasteful number, since it uses less digits than its factorization.

1379942569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221687.

The product of its digits is 3674160, while the sum is 55.

The square root of 1379942569 is about 37147.5782386955. The cubic root of 1379942569 is about 1113.3208368584.

The spelling of 1379942569 in words is "one billion, three hundred seventy-nine million, nine hundred forty-two thousand, five hundred sixty-nine".