1153021997 has 2 divisors, whose sum is σ = 1153021998. Its totient is φ = 1153021996.

The previous prime is 1153021981. The next prime is 1153021999. The reversal of 1153021997 is 7991203511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092897481 + 60124516 = 33059^2 + 7754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1153021997 - 2⁴ = 1153021981 is a prime.

Together with 1153021999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1153021997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1153021999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576510998 + 576510999.

It is an arithmetic number, because the mean of its divisors is an integer number (576510999).

Almost surely, 2^1153021997 is an apocalyptic number.

It is an amenable number.

1153021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153021997 is an equidigital number, since it uses as much as digits as its factorization.

1153021997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1153021997 is about 33956.1775970147. The cubic root of 1153021997 is about 1048.6064648813.

The spelling of 1153021997 in words is "one billion, one hundred fifty-three million, twenty-one thousand, nine hundred ninety-seven".