1125989617 has 2 divisors, whose sum is σ = 1125989618. Its totient is φ = 1125989616.

The previous prime is 1125989593. The next prime is 1125989621. The reversal of 1125989617 is 7169895211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 564110001 + 561879616 = 23751^2 + 23704^2 .

It is an emirp because it is prime and its reverse (7169895211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125989617 - 2⁷ = 1125989489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125984617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562994808 + 562994809.

It is an arithmetic number, because the mean of its divisors is an integer number (562994809).

Almost surely, 2^1125989617 is an apocalyptic number.

It is an amenable number.

1125989617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125989617 is an equidigital number, since it uses as much as digits as its factorization.

1125989617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 49.

The square root of 1125989617 is about 33555.7687588885. The cubic root of 1125989617 is about 1040.3467830842.

The spelling of 1125989617 in words is "one billion, one hundred twenty-five million, nine hundred eighty-nine thousand, six hundred seventeen".