1155236897 has 2 divisors, whose sum is σ = 1155236898. Its totient is φ = 1155236896.

The previous prime is 1155236891. The next prime is 1155236941. The reversal of 1155236897 is 7986325511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640899856 + 514337041 = 25316^2 + 22679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155236897 - 2⁶ = 1155236833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155236891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577618448 + 577618449.

It is an arithmetic number, because the mean of its divisors is an integer number (577618449).

Almost surely, 2^1155236897 is an apocalyptic number.

It is an amenable number.

1155236897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155236897 is an equidigital number, since it uses as much as digits as its factorization.

1155236897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 47.

The square root of 1155236897 is about 33988.7760444533. The cubic root of 1155236897 is about 1049.2774763265.

The spelling of 1155236897 in words is "one billion, one hundred fifty-five million, two hundred thirty-six thousand, eight hundred ninety-seven".