1128865537 has 2 divisors, whose sum is σ = 1128865538. Its totient is φ = 1128865536.

The previous prime is 1128865489. The next prime is 1128865567. The reversal of 1128865537 is 7355688211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 817731216 + 311134321 = 28596^2 + 17639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128865537 is a prime.

It is a super-3 number, since 3×1128865537³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1128865567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564432768 + 564432769.

It is an arithmetic number, because the mean of its divisors is an integer number (564432769).

Almost surely, 2^1128865537 is an apocalyptic number.

It is an amenable number.

1128865537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128865537 is an equidigital number, since it uses as much as digits as its factorization.

1128865537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 46.

The square root of 1128865537 is about 33598.5942711894. The cubic root of 1128865537 is about 1041.2317558546.

The spelling of 1128865537 in words is "one billion, one hundred twenty-eight million, eight hundred sixty-five thousand, five hundred thirty-seven".