1128948361 has 2 divisors, whose sum is σ = 1128948362. Its totient is φ = 1128948360.

The previous prime is 1128948311. The next prime is 1128948383. The reversal of 1128948361 is 1638498211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788767225 + 340181136 = 28085^2 + 18444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128948361 - 2²³ = 1120559753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128948311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564474180 + 564474181.

It is an arithmetic number, because the mean of its divisors is an integer number (564474181).

Almost surely, 2^1128948361 is an apocalyptic number.

It is an amenable number.

1128948361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128948361 is an equidigital number, since it uses as much as digits as its factorization.

1128948361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 1128948361 is about 33599.8268001488. The cubic root of 1128948361 is about 1041.2572200240.

The spelling of 1128948361 in words is "one billion, one hundred twenty-eight million, nine hundred forty-eight thousand, three hundred sixty-one".