1188945157 has 2 divisors, whose sum is σ = 1188945158. Its totient is φ = 1188945156.

The previous prime is 1188945137. The next prime is 1188945169. The reversal of 1188945157 is 7515498811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871784676 + 317160481 = 29526^2 + 17809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188945157 - 2¹⁹ = 1188420869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1188945157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188945137) 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, 594472578 + 594472579.

It is an arithmetic number, because the mean of its divisors is an integer number (594472579).

Almost surely, 2^1188945157 is an apocalyptic number.

It is an amenable number.

1188945157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188945157 is an equidigital number, since it uses as much as digits as its factorization.

1188945157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 49.

The square root of 1188945157 is about 34481.0840461839. The cubic root of 1188945157 is about 1059.3852959636.

The spelling of 1188945157 in words is "one billion, one hundred eighty-eight million, nine hundred forty-five thousand, one hundred fifty-seven".