1189209253 has 2 divisors, whose sum is σ = 1189209254. Its totient is φ = 1189209252.

The previous prime is 1189209191. The next prime is 1189209257. The reversal of 1189209253 is 3529029811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737774244 + 451435009 = 27162^2 + 21247^2 .

It is an emirp because it is prime and its reverse (3529029811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189209253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189209257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594604626 + 594604627.

It is an arithmetic number, because the mean of its divisors is an integer number (594604627).

Almost surely, 2^1189209253 is an apocalyptic number.

It is an amenable number.

1189209253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189209253 is an equidigital number, since it uses as much as digits as its factorization.

1189209253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1189209253 is about 34484.9134115195. The cubic root of 1189209253 is about 1059.4637292719.

The spelling of 1189209253 in words is "one billion, one hundred eighty-nine million, two hundred nine thousand, two hundred fifty-three".