1147897397 has 2 divisors, whose sum is σ = 1147897398. Its totient is φ = 1147897396.

The previous prime is 1147897393. The next prime is 1147897411. The reversal of 1147897397 is 7937987411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 905347921 + 242549476 = 30089^2 + 15574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1147897397 - 2² = 1147897393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147897393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573948698 + 573948699.

It is an arithmetic number, because the mean of its divisors is an integer number (573948699).

Almost surely, 2^1147897397 is an apocalyptic number.

It is an amenable number.

1147897397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147897397 is an equidigital number, since it uses as much as digits as its factorization.

1147897397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 56.

The square root of 1147897397 is about 33880.6345424639. The cubic root of 1147897397 is about 1047.0506490831.

The spelling of 1147897397 in words is "one billion, one hundred forty-seven million, eight hundred ninety-seven thousand, three hundred ninety-seven".