1197555397 has 2 divisors, whose sum is σ = 1197555398. Its totient is φ = 1197555396.

The previous prime is 1197555371. The next prime is 1197555407. The reversal of 1197555397 is 7935557911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705114916 + 492440481 = 26554^2 + 22191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1197555397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1197555097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598777698 + 598777699.

It is an arithmetic number, because the mean of its divisors is an integer number (598777699).

Almost surely, 2^1197555397 is an apocalyptic number.

It is an amenable number.

1197555397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197555397 is an equidigital number, since it uses as much as digits as its factorization.

1197555397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1488375, while the sum is 52.

The square root of 1197555397 is about 34605.7133577680. The cubic root of 1197555397 is about 1061.9364735261.

The spelling of 1197555397 in words is "one billion, one hundred ninety-seven million, five hundred fifty-five thousand, three hundred ninety-seven".