1299404089 has 4 divisors (see below), whose sum is σ = 1300987620. Its totient is φ = 1297820560.

The previous prime is 1299404081. The next prime is 1299404107. The reversal of 1299404089 is 9804049921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9804049921 = 91081 ⋅107641.

It can be written as a sum of positive squares in 2 ways, for example, as 420578064 + 878826025 = 20508^2 + 29645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299404089 - 2³ = 1299404081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299404081) 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 in 3 ways as a sum of consecutive naturals, for example, 790534 + ... + 792175.

It is an arithmetic number, because the mean of its divisors is an integer number (325246905).

Almost surely, 2^1299404089 is an apocalyptic number.

It is an amenable number.

1299404089 is a deficient number, since it is larger than the sum of its proper divisors (1583531).

1299404089 is an equidigital number, since it uses as much as digits as its factorization.

1299404089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583530.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1299404089 is about 36047.2480086899. The cubic root of 1299404089 is about 1091.2260952598.

The spelling of 1299404089 in words is "one billion, two hundred ninety-nine million, four hundred four thousand, eighty-nine".