1189173131 has 2 divisors, whose sum is σ = 1189173132. Its totient is φ = 1189173130.

The previous prime is 1189173059. The next prime is 1189173199. The reversal of 1189173131 is 1313719811.

It is a strong prime.

It is an emirp because it is prime and its reverse (1313719811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1189173131 - 2²² = 1184978827 is a prime.

It is a super-2 number, since 2×1189173131² = 2828265470984686322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1189173091 and 1189173100.

It is not a weakly prime, because it can be changed into another prime (1189173331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594586565 + 594586566.

It is an arithmetic number, because the mean of its divisors is an integer number (594586566).

Almost surely, 2^1189173131 is an apocalyptic number.

1189173131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189173131 is an equidigital number, since it uses as much as digits as its factorization.

1189173131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 35.

The square root of 1189173131 is about 34484.3896712701. The cubic root of 1189173131 is about 1059.4530021617.

The spelling of 1189173131 in words is "one billion, one hundred eighty-nine million, one hundred seventy-three thousand, one hundred thirty-one".