1318808249 has 4 divisors (see below), whose sum is σ = 1438699920. Its totient is φ = 1198916580.

The previous prime is 1318808243. The next prime is 1318808333. The reversal of 1318808249 is 9428088131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1318808249 - 2⁴ = 1318808233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318808243) 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, 59945819 + ... + 59945840.

It is an arithmetic number, because the mean of its divisors is an integer number (359674980).

Almost surely, 2^1318808249 is an apocalyptic number.

It is an amenable number.

1318808249 is a deficient number, since it is larger than the sum of its proper divisors (119891671).

1318808249 is a wasteful number, since it uses less digits than its factorization.

1318808249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119891670.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 1318808249 is about 36315.3996122857. The cubic root of 1318808249 is about 1096.6310836264.

It can be divided in two parts, 13188082 and 49, that added together give a palindrome (13188131).

The spelling of 1318808249 in words is "one billion, three hundred eighteen million, eight hundred eight thousand, two hundred forty-nine".