1129639745 has 8 divisors (see below), whose sum is σ = 1459842216. Its totient is φ = 834195456.

The previous prime is 1129639691. The next prime is 1129639751. The reversal of 1129639745 is 5479369211.

It can be written as a sum of positive squares in 4 ways, for example, as 18284176 + 1111355569 = 4276^2 + 33337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129639745 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129639745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8689472 + ... + 8689601.

It is an arithmetic number, because the mean of its divisors is an integer number (182480277).

Almost surely, 2^1129639745 is an apocalyptic number.

It is an amenable number.

1129639745 is a deficient number, since it is larger than the sum of its proper divisors (330202471).

1129639745 is a wasteful number, since it uses less digits than its factorization.

1129639745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17379091.

The product of its digits is 408240, while the sum is 47.

The square root of 1129639745 is about 33610.1137308400. The cubic root of 1129639745 is about 1041.4697368807.

The spelling of 1129639745 in words is "one billion, one hundred twenty-nine million, six hundred thirty-nine thousand, seven hundred forty-five".