1218498299 has 6 divisors (see below), whose sum is σ = 1225866444. Its totient is φ = 1211174180.

The previous prime is 1218498289. The next prime is 1218498313. The reversal of 1218498299 is 9928948121.

It is a happy number.

It is not a de Polignac number, because 1218498299 - 2⁴ = 1218498283 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 1218498299.

It is not an unprimeable number, because it can be changed into a prime (1218498289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6044 + ... + 49734.

It is an arithmetic number, because the mean of its divisors is an integer number (204311074).

Almost surely, 2^1218498299 is an apocalyptic number.

1218498299 is a deficient number, since it is larger than the sum of its proper divisors (7368145).

1218498299 is an frugal number, since it uses more digits than its factorization.

1218498299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44025 (or 43858 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 1218498299 is about 34906.9949866785. The cubic root of 1218498299 is about 1068.0911315181.

The spelling of 1218498299 in words is "one billion, two hundred eighteen million, four hundred ninety-eight thousand, two hundred ninety-nine".