1189408393 has 2 divisors, whose sum is σ = 1189408394. Its totient is φ = 1189408392.

The previous prime is 1189408373. The next prime is 1189408399. The reversal of 1189408393 is 3938049811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 966712464 + 222695929 = 31092^2 + 14923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189408393 is a prime.

It is a super-3 number, since 3×1189408393³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1189408399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594704196 + 594704197.

It is an arithmetic number, because the mean of its divisors is an integer number (594704197).

Almost surely, 2^1189408393 is an apocalyptic number.

It is an amenable number.

1189408393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189408393 is an equidigital number, since it uses as much as digits as its factorization.

1189408393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1189408393 is about 34487.8006402264. The cubic root of 1189408393 is about 1059.5228637573.

The spelling of 1189408393 in words is "one billion, one hundred eighty-nine million, four hundred eight thousand, three hundred ninety-three".