1078179991 has 8 divisors (see below), whose sum is σ = 1233698720. Its totient is φ = 923034528.

The previous prime is 1078179989. The next prime is 1078180003. The reversal of 1078179991 is 1999718701.

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 1078179991 - 2¹ = 1078179989 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 (1078179691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87096 + ... + 98701.

It is an arithmetic number, because the mean of its divisors is an integer number (154212340).

Almost surely, 2^1078179991 is an apocalyptic number.

1078179991 is a deficient number, since it is larger than the sum of its proper divisors (155518729).

1078179991 is an equidigital number, since it uses as much as digits as its factorization.

1078179991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186633.

The product of its (nonzero) digits is 285768, while the sum is 52.

The square root of 1078179991 is about 32835.6512193683. The cubic root of 1078179991 is about 1025.4089158847.

The spelling of 1078179991 in words is "one billion, seventy-eight million, one hundred seventy-nine thousand, nine hundred ninety-one".