1128001631 has 2 divisors, whose sum is σ = 1128001632. Its totient is φ = 1128001630.

The previous prime is 1128001601. The next prime is 1128001639. The reversal of 1128001631 is 1361008211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1361008211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128001631 is a prime.

It is a super-3 number, since 3×1128001631³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128001597 and 1128001606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128001639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564000815 + 564000816.

It is an arithmetic number, because the mean of its divisors is an integer number (564000816).

Almost surely, 2^1128001631 is an apocalyptic number.

1128001631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128001631 is an equidigital number, since it uses as much as digits as its factorization.

1128001631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1128001631 is about 33585.7355286437. The cubic root of 1128001631 is about 1040.9660743969.

Adding to 1128001631 its reverse (1361008211), we get a palindrome (2489009842).

The spelling of 1128001631 in words is "one billion, one hundred twenty-eight million, one thousand, six hundred thirty-one".