1187728747 has 2 divisors, whose sum is σ = 1187728748. Its totient is φ = 1187728746.

The previous prime is 1187728723. The next prime is 1187728769. The reversal of 1187728747 is 7478277811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1187728747 - 2¹⁵ = 1187695979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1187728694 and 1187728703.

It is not a weakly prime, because it can be changed into another prime (1187728847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593864373 + 593864374.

It is an arithmetic number, because the mean of its divisors is an integer number (593864374).

Almost surely, 2^1187728747 is an apocalyptic number.

1187728747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187728747 is an equidigital number, since it uses as much as digits as its factorization.

1187728747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1229312, while the sum is 52.

The square root of 1187728747 is about 34463.4407307222. The cubic root of 1187728747 is about 1059.0238869219.

The spelling of 1187728747 in words is "one billion, one hundred eighty-seven million, seven hundred twenty-eight thousand, seven hundred forty-seven".