1157091223 has 2 divisors, whose sum is σ = 1157091224. Its totient is φ = 1157091222.

The previous prime is 1157091211. The next prime is 1157091227. The reversal of 1157091223 is 3221907511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157091223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157091227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578545611 + 578545612.

It is an arithmetic number, because the mean of its divisors is an integer number (578545612).

Almost surely, 2^1157091223 is an apocalyptic number.

1157091223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157091223 is an equidigital number, since it uses as much as digits as its factorization.

1157091223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 1157091223 is about 34016.0436118018. The cubic root of 1157091223 is about 1049.8385913645.

Adding to 1157091223 its reverse (3221907511), we get a palindrome (4378998734).

The spelling of 1157091223 in words is "one billion, one hundred fifty-seven million, ninety-one thousand, two hundred twenty-three".