1161313279 has 14 divisors (see below), whose sum is σ = 1355001104. Its totient is φ = 995310540.

The previous prime is 1161313277. The next prime is 1161313291. The reversal of 1161313279 is 9723131611.

It is a happy number.

It is not a de Polignac number, because 1161313279 - 2¹ = 1161313277 is a prime.

It is a Duffinian number.

1161313279 is a modest number, since divided by 13279 gives 11613 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161313277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 112714 + ... + 122584.

Almost surely, 2^1161313279 is an apocalyptic number.

1161313279 is a deficient number, since it is larger than the sum of its proper divisors (193687825).

1161313279 is an frugal number, since it uses more digits than its factorization.

1161313279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9913 (or 9878 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 1161313279 is about 34078.0468777188. The cubic root of 1161313279 is about 1051.1139437265.

The spelling of 1161313279 in words is "one billion, one hundred sixty-one million, three hundred thirteen thousand, two hundred seventy-nine".