1131657709 has 16 divisors (see below), whose sum is σ = 1397596032. Its totient is φ = 892300608.

The previous prime is 1131657679. The next prime is 1131657713. The reversal of 1131657709 is 9077561311.

It is a cyclic number.

It is not a de Polignac number, because 1131657709 - 2⁵ = 1131657677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131657719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5442 + ... + 47884.

It is an arithmetic number, because the mean of its divisors is an integer number (87349752).

Almost surely, 2^1131657709 is an apocalyptic number.

It is an amenable number.

1131657709 is a deficient number, since it is larger than the sum of its proper divisors (265938323).

1131657709 is a wasteful number, since it uses less digits than its factorization.

1131657709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42756.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 1131657709 is about 33640.1205259434. The cubic root of 1131657709 is about 1042.0895209725.

The spelling of 1131657709 in words is "one billion, one hundred thirty-one million, six hundred fifty-seven thousand, seven hundred nine".