1269380399 has 8 divisors (see below), whose sum is σ = 1455387648. Its totient is φ = 1084539960.

The previous prime is 1269380383. The next prime is 1269380401. The reversal of 1269380399 is 9930839621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1269380399 - 2⁴ = 1269380383 is a prime.

It is a super-2 number, since 2×1269380399² = 3222653194730798402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269380309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289367 + ... + 293720.

It is an arithmetic number, because the mean of its divisors is an integer number (181923456).

Almost surely, 2^1269380399 is an apocalyptic number.

1269380399 is a deficient number, since it is larger than the sum of its proper divisors (186007249).

1269380399 is an equidigital number, since it uses as much as digits as its factorization.

1269380399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583405.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 1269380399 is about 35628.3650901918. The cubic root of 1269380399 is about 1082.7559924170.

The spelling of 1269380399 in words is "one billion, two hundred sixty-nine million, three hundred eighty thousand, three hundred ninety-nine".