1081347557 has 2 divisors, whose sum is σ = 1081347558. Its totient is φ = 1081347556.

The previous prime is 1081347539. The next prime is 1081347569. The reversal of 1081347557 is 7557431801.

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., 637360516 + 443987041 = 25246^2 + 21071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081347557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081347587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540673778 + 540673779.

It is an arithmetic number, because the mean of its divisors is an integer number (540673779).

Almost surely, 2^1081347557 is an apocalyptic number.

It is an amenable number.

1081347557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081347557 is an equidigital number, since it uses as much as digits as its factorization.

1081347557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 1081347557 is about 32883.8494857278. The cubic root of 1081347557 is about 1026.4121110314.

The spelling of 1081347557 in words is "one billion, eighty-one million, three hundred forty-seven thousand, five hundred fifty-seven".