1087633649 has 2 divisors, whose sum is σ = 1087633650. Its totient is φ = 1087633648.

The previous prime is 1087633571. The next prime is 1087633693. The reversal of 1087633649 is 9463367801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1087350625 + 283024 = 32975^2 + 532^2 .

It is an emirp because it is prime and its reverse (9463367801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1087633649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1087633699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543816824 + 543816825.

It is an arithmetic number, because the mean of its divisors is an integer number (543816825).

Almost surely, 2^1087633649 is an apocalyptic number.

It is an amenable number.

1087633649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087633649 is an equidigital number, since it uses as much as digits as its factorization.

1087633649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 1087633649 is about 32979.2912143363. The cubic root of 1087633649 is about 1028.3971831590.

The spelling of 1087633649 in words is "one billion, eighty-seven million, six hundred thirty-three thousand, six hundred forty-nine".