1078148791 has 4 divisors (see below), whose sum is σ = 1094240632. Its totient is φ = 1062056952.

The previous prime is 1078148777. The next prime is 1078148807. The reversal of 1078148791 is 1978418701.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1078148791 - 2¹¹ = 1078146743 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 (1078148741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8045820 + ... + 8045953.

It is an arithmetic number, because the mean of its divisors is an integer number (273560158).

Almost surely, 2^1078148791 is an apocalyptic number.

1078148791 is a deficient number, since it is larger than the sum of its proper divisors (16091841).

1078148791 is an equidigital number, since it uses as much as digits as its factorization.

1078148791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16091840.

The product of its (nonzero) digits is 112896, while the sum is 46.

The square root of 1078148791 is about 32835.1761225671. The cubic root of 1078148791 is about 1025.3990248130.

The spelling of 1078148791 in words is "one billion, seventy-eight million, one hundred forty-eight thousand, seven hundred ninety-one".