1218537137 has 8 divisors (see below), whose sum is σ = 1224195840. Its totient is φ = 1212887520.

The previous prime is 1218537121. The next prime is 1218537143. The reversal of 1218537137 is 7317358121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218537137 - 2⁴ = 1218537121 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 1218537137.

It is not an unprimeable number, because it can be changed into a prime (1218537197) 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 7 ways as a sum of consecutive naturals, for example, 508013 + ... + 510405.

It is an arithmetic number, because the mean of its divisors is an integer number (153024480).

Almost surely, 2^1218537137 is an apocalyptic number.

It is an amenable number.

1218537137 is a deficient number, since it is larger than the sum of its proper divisors (5658703).

1218537137 is a wasteful number, since it uses less digits than its factorization.

1218537137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543.

The product of its digits is 35280, while the sum is 38.

The square root of 1218537137 is about 34907.5512890836. The cubic root of 1218537137 is about 1068.1024793886.

The spelling of 1218537137 in words is "one billion, two hundred eighteen million, five hundred thirty-seven thousand, one hundred thirty-seven".