1157243837 has 2 divisors, whose sum is σ = 1157243838. Its totient is φ = 1157243836.

The previous prime is 1157243833. The next prime is 1157243861. The reversal of 1157243837 is 7383427511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071514756 + 85729081 = 32734^2 + 9259^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157243837 - 2² = 1157243833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1157243794 and 1157243803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157243833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578621918 + 578621919.

It is an arithmetic number, because the mean of its divisors is an integer number (578621919).

Almost surely, 2^1157243837 is an apocalyptic number.

It is an amenable number.

1157243837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157243837 is an equidigital number, since it uses as much as digits as its factorization.

1157243837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 1157243837 is about 34018.2868028359. The cubic root of 1157243837 is about 1049.8847453237.

The spelling of 1157243837 in words is "one billion, one hundred fifty-seven million, two hundred forty-three thousand, eight hundred thirty-seven".