1087155913 has 2 divisors, whose sum is σ = 1087155914. Its totient is φ = 1087155912.

The previous prime is 1087155887. The next prime is 1087155917. The reversal of 1087155913 is 3195517801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558707769 + 528448144 = 23637^2 + 22988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1087155913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1087155917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543577956 + 543577957.

It is an arithmetic number, because the mean of its divisors is an integer number (543577957).

Almost surely, 2^1087155913 is an apocalyptic number.

It is an amenable number.

1087155913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087155913 is an equidigital number, since it uses as much as digits as its factorization.

1087155913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The square root of 1087155913 is about 32972.0474493168. The cubic root of 1087155913 is about 1028.2465888517.

The spelling of 1087155913 in words is "one billion, eighty-seven million, one hundred fifty-five thousand, nine hundred thirteen".