1279147939 has 8 divisors (see below), whose sum is σ = 1284839568. Its totient is φ = 1273467360.

The previous prime is 1279147897. The next prime is 1279147973. The reversal of 1279147939 is 9397419721.

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 1279147939 - 2¹³ = 1279139747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279147039) 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, 298069 + ... + 302329.

It is an arithmetic number, because the mean of its divisors is an integer number (160604946).

Almost surely, 2^1279147939 is an apocalyptic number.

1279147939 is a deficient number, since it is larger than the sum of its proper divisors (5691629).

1279147939 is an equidigital number, since it uses as much as digits as its factorization.

1279147939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5525.

The product of its digits is 857304, while the sum is 52.

The square root of 1279147939 is about 35765.1777431624. The cubic root of 1279147939 is about 1085.5260713485.

The spelling of 1279147939 in words is "one billion, two hundred seventy-nine million, one hundred forty-seven thousand, nine hundred thirty-nine".