1291088279 has 16 divisors (see below), whose sum is σ = 1497667584. Its totient is φ = 1103176800.

The previous prime is 1291088269. The next prime is 1291088299. The reversal of 1291088279 is 9728801921.

It is a cyclic number.

It is not a de Polignac number, because 1291088279 - 2⁴ = 1291088263 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 (1291088269) 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 15 ways as a sum of consecutive naturals, for example, 60377 + ... + 78914.

It is an arithmetic number, because the mean of its divisors is an integer number (93604224).

Almost surely, 2^1291088279 is an apocalyptic number.

1291088279 is a deficient number, since it is larger than the sum of its proper divisors (206579305).

1291088279 is a wasteful number, since it uses less digits than its factorization.

1291088279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139358.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1291088279 is about 35931.7168946879. The cubic root of 1291088279 is about 1088.8932679845.

The spelling of 1291088279 in words is "one billion, two hundred ninety-one million, eighty-eight thousand, two hundred seventy-nine".