1078777013 has 4 divisors (see below), whose sum is σ = 1078903980. Its totient is φ = 1078650048.

The previous prime is 1078777001. The next prime is 1078777043. The reversal of 1078777013 is 3107778701.

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

It can be written as a sum of positive squares in 2 ways, for example, as 591559684 + 487217329 = 24322^2 + 22073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078777013 - 2⁴ = 1078776997 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 (1078777043) 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 3 ways as a sum of consecutive naturals, for example, 49748 + ... + 68061.

It is an arithmetic number, because the mean of its divisors is an integer number (269725995).

Almost surely, 2^1078777013 is an apocalyptic number.

It is an amenable number.

1078777013 is a deficient number, since it is larger than the sum of its proper divisors (126967).

1078777013 is an equidigital number, since it uses as much as digits as its factorization.

1078777013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126966.

The product of its (nonzero) digits is 57624, while the sum is 41.

The square root of 1078777013 is about 32844.7410250104. The cubic root of 1078777013 is about 1025.5981479626.

The spelling of 1078777013 in words is "one billion, seventy-eight million, seven hundred seventy-seven thousand, thirteen".