1187345747 has 8 divisors (see below), whose sum is σ = 1374144000. Its totient is φ = 1004841864.

The previous prime is 1187345743. The next prime is 1187345749. The reversal of 1187345747 is 7475437811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1187345747 - 2² = 1187345743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187345743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072997 + ... + 1074102.

It is an arithmetic number, because the mean of its divisors is an integer number (171768000).

Almost surely, 2^1187345747 is an apocalyptic number.

1187345747 is a deficient number, since it is larger than the sum of its proper divisors (186798253).

1187345747 is an equidigital number, since it uses as much as digits as its factorization.

1187345747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147185.

The product of its digits is 658560, while the sum is 47.

The square root of 1187345747 is about 34457.8836697787. The cubic root of 1187345747 is about 1058.9100422540.

The spelling of 1187345747 in words is "one billion, one hundred eighty-seven million, three hundred forty-five thousand, seven hundred forty-seven".