1361259969 has 4 divisors (see below), whose sum is σ = 1815013296. Its totient is φ = 907506644.

The previous prime is 1361259947. The next prime is 1361259973. The reversal of 1361259969 is 9699521631.

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.

It is a cyclic number.

It is not a de Polignac number, because 1361259969 - 2⁷ = 1361259841 is a prime.

It is a super-2 number, since 2×1361259969² = 3706057406403761922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1361259169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226876659 + ... + 226876664.

It is an arithmetic number, because the mean of its divisors is an integer number (453753324).

Almost surely, 2^1361259969 is an apocalyptic number.

It is an amenable number.

1361259969 is a deficient number, since it is larger than the sum of its proper divisors (453753327).

1361259969 is an equidigital number, since it uses as much as digits as its factorization.

1361259969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453753326.

The product of its digits is 787320, while the sum is 51.

The square root of 1361259969 is about 36895.2567276608. The cubic root of 1361259969 is about 1108.2736926896.

The spelling of 1361259969 in words is "one billion, three hundred sixty-one million, two hundred fifty-nine thousand, nine hundred sixty-nine".