1078717787 has 4 divisors (see below), whose sum is σ = 1232820336. Its totient is φ = 924615240.

The previous prime is 1078717777. The next prime is 1078717789. The reversal of 1078717787 is 7877178701.

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 1078717787 - 2¹⁰ = 1078716763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1078717789) 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, 77051264 + ... + 77051277.

It is an arithmetic number, because the mean of its divisors is an integer number (308205084).

Almost surely, 2^1078717787 is an apocalyptic number.

1078717787 is a deficient number, since it is larger than the sum of its proper divisors (154102549).

1078717787 is an equidigital number, since it uses as much as digits as its factorization.

1078717787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154102548.

The product of its (nonzero) digits is 1075648, while the sum is 53.

The square root of 1078717787 is about 32843.8394071095. The cubic root of 1078717787 is about 1025.5793788111.

The spelling of 1078717787 in words is "one billion, seventy-eight million, seven hundred seventeen thousand, seven hundred eighty-seven".