1148999813 has 16 divisors (see below), whose sum is σ = 1273735680. Its totient is φ = 1029589056.

The previous prime is 1148999809. The next prime is 1148999837. The reversal of 1148999813 is 3189998411.

It is a cyclic number.

It is not a de Polignac number, because 1148999813 - 2² = 1148999809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1148999413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227906 + ... + 232892.

It is an arithmetic number, because the mean of its divisors is an integer number (79608480).

Almost surely, 2^1148999813 is an apocalyptic number.

1148999813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1148999813 is a deficient number, since it is larger than the sum of its proper divisors (124735867).

1148999813 is a wasteful number, since it uses less digits than its factorization.

1148999813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516.

The product of its digits is 559872, while the sum is 53.

The square root of 1148999813 is about 33896.8997549923. The cubic root of 1148999813 is about 1047.3857301543.

The spelling of 1148999813 in words is "one billion, one hundred forty-eight million, nine hundred ninety-nine thousand, eight hundred thirteen".