1079878591 has 4 divisors (see below), whose sum is σ = 1178049384. Its totient is φ = 981707800.

The previous prime is 1079878537. The next prime is 1079878619. The reversal of 1079878591 is 1958789701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1958789701 = 11 ⋅178071791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1079878591 is a prime.

It is a super-2 number, since 2×1079878591² = 2332275542600290562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1079878531) 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 3 ways as a sum of consecutive naturals, for example, 49085380 + ... + 49085401.

It is an arithmetic number, because the mean of its divisors is an integer number (294512346).

Almost surely, 2^1079878591 is an apocalyptic number.

1079878591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1079878591 is a deficient number, since it is larger than the sum of its proper divisors (98170793).

1079878591 is an equidigital number, since it uses as much as digits as its factorization.

1079878591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98170792.

The product of its (nonzero) digits is 1270080, while the sum is 55.

The square root of 1079878591 is about 32861.5062192834. The cubic root of 1079878591 is about 1025.9471209228.

The spelling of 1079878591 in words is "one billion, seventy-nine million, eight hundred seventy-eight thousand, five hundred ninety-one".