1087247771 has 2 divisors, whose sum is σ = 1087247772. Its totient is φ = 1087247770.

The previous prime is 1087247753. The next prime is 1087247797. The reversal of 1087247771 is 1777427801.

It is a weak prime.

It is an emirp because it is prime and its reverse (1777427801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1087247771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1087247071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543623885 + 543623886.

It is an arithmetic number, because the mean of its divisors is an integer number (543623886).

Almost surely, 2^1087247771 is an apocalyptic number.

1087247771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087247771 is an equidigital number, since it uses as much as digits as its factorization.

1087247771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153664, while the sum is 44.

The square root of 1087247771 is about 32973.4403876817. The cubic root of 1087247771 is about 1028.2755482107.

The spelling of 1087247771 in words is "one billion, eighty-seven million, two hundred forty-seven thousand, seven hundred seventy-one".