1148938961 has 2 divisors, whose sum is σ = 1148938962. Its totient is φ = 1148938960.

The previous prime is 1148938951. The next prime is 1148938979. The reversal of 1148938961 is 1698398411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764190736 + 384748225 = 27644^2 + 19615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1148938961 - 2²⁶ = 1081830097 is a prime.

It is a super-2 number, since 2×1148938961² = 2640121472207519042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1148938951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574469480 + 574469481.

It is an arithmetic number, because the mean of its divisors is an integer number (574469481).

Almost surely, 2^1148938961 is an apocalyptic number.

It is an amenable number.

1148938961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1148938961 is an equidigital number, since it uses as much as digits as its factorization.

1148938961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 1148938961 is about 33896.0021388954. The cubic root of 1148938961 is about 1047.3672396838.

The spelling of 1148938961 in words is "one billion, one hundred forty-eight million, nine hundred thirty-eight thousand, nine hundred sixty-one".