1131357709 has 2 divisors, whose sum is σ = 1131357710. Its totient is φ = 1131357708.

The previous prime is 1131357697. The next prime is 1131357743. The reversal of 1131357709 is 9077531311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726140809 + 405216900 = 26947^2 + 20130^2 .

It is an emirp because it is prime and its reverse (9077531311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131357709 - 2⁷ = 1131357581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131357809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565678854 + 565678855.

It is an arithmetic number, because the mean of its divisors is an integer number (565678855).

Almost surely, 2^1131357709 is an apocalyptic number.

It is an amenable number.

1131357709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131357709 is an equidigital number, since it uses as much as digits as its factorization.

1131357709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19845, while the sum is 37.

The square root of 1131357709 is about 33635.6612689568. The cubic root of 1131357709 is about 1041.9974276114.

The spelling of 1131357709 in words is "one billion, one hundred thirty-one million, three hundred fifty-seven thousand, seven hundred nine".