1149808747 has 4 divisors (see below), whose sum is σ = 1150260976. Its totient is φ = 1149356520.

The previous prime is 1149808729. The next prime is 1149808763. The reversal of 1149808747 is 7478089411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1149808747 - 2¹⁹ = 1149284459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1149808747.

It is not an unprimeable number, because it can be changed into a prime (1149808727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222279 + ... + 227392.

It is an arithmetic number, because the mean of its divisors is an integer number (287565244).

Almost surely, 2^1149808747 is an apocalyptic number.

1149808747 is a deficient number, since it is larger than the sum of its proper divisors (452229).

1149808747 is an equidigital number, since it uses as much as digits as its factorization.

1149808747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452228.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 1149808747 is about 33908.8299267315. The cubic root of 1149808747 is about 1047.6314705980.

The spelling of 1149808747 in words is "one billion, one hundred forty-nine million, eight hundred eight thousand, seven hundred forty-seven".