1279463389 has 4 divisors (see below), whose sum is σ = 1335092256. Its totient is φ = 1223834524.

The previous prime is 1279463387. The next prime is 1279463431. The reversal of 1279463389 is 9833649721.

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 1279463389 - 2¹ = 1279463387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279463387) 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, 27814399 + ... + 27814444.

It is an arithmetic number, because the mean of its divisors is an integer number (333773064).

Almost surely, 2^1279463389 is an apocalyptic number.

It is an amenable number.

1279463389 is a deficient number, since it is larger than the sum of its proper divisors (55628867).

1279463389 is an equidigital number, since it uses as much as digits as its factorization.

1279463389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55628866.

The product of its digits is 1959552, while the sum is 52.

The square root of 1279463389 is about 35769.5874871377. The cubic root of 1279463389 is about 1085.6152976853.

The spelling of 1279463389 in words is "one billion, two hundred seventy-nine million, four hundred sixty-three thousand, three hundred eighty-nine".