1188145493 has 2 divisors, whose sum is σ = 1188145494. Its totient is φ = 1188145492.

The previous prime is 1188145471. The next prime is 1188145499. The reversal of 1188145493 is 3945418811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952154449 + 235991044 = 30857^2 + 15362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188145493 - 2⁶ = 1188145429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188145499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594072746 + 594072747.

It is an arithmetic number, because the mean of its divisors is an integer number (594072747).

Almost surely, 2^1188145493 is an apocalyptic number.

It is an amenable number.

1188145493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188145493 is an equidigital number, since it uses as much as digits as its factorization.

1188145493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 44.

The square root of 1188145493 is about 34469.4864046449. The cubic root of 1188145493 is about 1059.1477346048.

The spelling of 1188145493 in words is "one billion, one hundred eighty-eight million, one hundred forty-five thousand, four hundred ninety-three".