1012778289 has 8 divisors (see below), whose sum is σ = 1500412320. Its totient is φ = 675185508.

The previous prime is 1012778287. The next prime is 1012778309. The reversal of 1012778289 is 9828772101.

It is not a de Polignac number, because 1012778289 - 2¹ = 1012778287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1012778287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18755127 + ... + 18755180.

It is an arithmetic number, because the mean of its divisors is an integer number (187551540).

Almost surely, 2^1012778289 is an apocalyptic number.

It is an amenable number.

1012778289 is a deficient number, since it is larger than the sum of its proper divisors (487634031).

1012778289 is an equidigital number, since it uses as much as digits as its factorization.

1012778289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37510316 (or 37510310 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 1012778289 is about 31824.1777427163. The cubic root of 1012778289 is about 1004.2414146348.

The spelling of 1012778289 in words is "one billion, twelve million, seven hundred seventy-eight thousand, two hundred eighty-nine".