1325558899 has 4 divisors (see below), whose sum is σ = 1514924464. Its totient is φ = 1136193336.

The previous prime is 1325558873. The next prime is 1325558911. The reversal of 1325558899 is 9988555231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9988555231 = 29 ⋅344432939.

It is a cyclic number.

It is not a de Polignac number, because 1325558899 - 2²³ = 1317170291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325558849) 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, 94682772 + ... + 94682785.

It is an arithmetic number, because the mean of its divisors is an integer number (378731116).

Almost surely, 2^1325558899 is an apocalyptic number.

1325558899 is a deficient number, since it is larger than the sum of its proper divisors (189365565).

1325558899 is an equidigital number, since it uses as much as digits as its factorization.

1325558899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189365564.

The product of its digits is 3888000, while the sum is 55.

The square root of 1325558899 is about 36408.2257051892. The cubic root of 1325558899 is about 1098.4990269270.

The spelling of 1325558899 in words is "one billion, three hundred twenty-five million, five hundred fifty-eight thousand, eight hundred ninety-nine".