1189924387 has 2 divisors, whose sum is σ = 1189924388. Its totient is φ = 1189924386.

The previous prime is 1189924369. The next prime is 1189924391. The reversal of 1189924387 is 7834299811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1189924387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1189924327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594962193 + 594962194.

It is an arithmetic number, because the mean of its divisors is an integer number (594962194).

Almost surely, 2^1189924387 is an apocalyptic number.

1189924387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189924387 is an equidigital number, since it uses as much as digits as its factorization.

1189924387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 1189924387 is about 34495.2806482278. The cubic root of 1189924387 is about 1059.6760571164.

The spelling of 1189924387 in words is "one billion, one hundred eighty-nine million, nine hundred twenty-four thousand, three hundred eighty-seven".