1131780499 has 2 divisors, whose sum is σ = 1131780500. Its totient is φ = 1131780498.

The previous prime is 1131780479. The next prime is 1131780553. The reversal of 1131780499 is 9940871311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131780499 - 2¹⁵ = 1131747731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131780449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565890249 + 565890250.

It is an arithmetic number, because the mean of its divisors is an integer number (565890250).

Almost surely, 2^1131780499 is an apocalyptic number.

1131780499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131780499 is an equidigital number, since it uses as much as digits as its factorization.

1131780499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 1131780499 is about 33641.9455293537. The cubic root of 1131780499 is about 1042.1272100910.

The spelling of 1131780499 in words is "one billion, one hundred thirty-one million, seven hundred eighty thousand, four hundred ninety-nine".