1188488993 has 2 divisors, whose sum is σ = 1188488994. Its totient is φ = 1188488992.

The previous prime is 1188488957. The next prime is 1188488999. The reversal of 1188488993 is 3998848811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177313344 + 11175649 = 34312^2 + 3343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188488993 - 2⁶ = 1188488929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1188488999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594244496 + 594244497.

It is an arithmetic number, because the mean of its divisors is an integer number (594244497).

Almost surely, 2^1188488993 is an apocalyptic number.

It is an amenable number.

1188488993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188488993 is an equidigital number, since it uses as much as digits as its factorization.

1188488993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 59.

The square root of 1188488993 is about 34474.4687123674. The cubic root of 1188488993 is about 1059.2497934279.

The spelling of 1188488993 in words is "one billion, one hundred eighty-eight million, four hundred eighty-eight thousand, nine hundred ninety-three".