1165498787 has 2 divisors, whose sum is σ = 1165498788. Its totient is φ = 1165498786.

The previous prime is 1165498781. The next prime is 1165498819. The reversal of 1165498787 is 7878945611.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7878945611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165498787 - 2¹² = 1165494691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165498781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582749393 + 582749394.

It is an arithmetic number, because the mean of its divisors is an integer number (582749394).

Almost surely, 2^1165498787 is an apocalyptic number.

1165498787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165498787 is an equidigital number, since it uses as much as digits as its factorization.

1165498787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 56.

The square root of 1165498787 is about 34139.4022648318. The cubic root of 1165498787 is about 1052.3752086197.

The spelling of 1165498787 in words is "one billion, one hundred sixty-five million, four hundred ninety-eight thousand, seven hundred eighty-seven".