1218969964 has 12 divisors (see below), whose sum is σ = 2133586224. Its totient is φ = 609373904.

The previous prime is 1218969929. The next prime is 1218970007. The reversal of 1218969964 is 4699698121.

It is a super-2 number, since 2×1218969964² = 2971775546268322592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9 + ... + 49375.

It is an arithmetic number, because the mean of its divisors is an integer number (177798852).

Almost surely, 2^1218969964 is an apocalyptic number.

It is an amenable number.

1218969964 is a deficient number, since it is larger than the sum of its proper divisors (914616260).

1218969964 is a wasteful number, since it uses less digits than its factorization.

1218969964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55544 (or 55542 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 1218969964 is about 34913.7503571301. The cubic root of 1218969964 is about 1068.2289285140.

The spelling of 1218969964 in words is "one billion, two hundred eighteen million, nine hundred sixty-nine thousand, nine hundred sixty-four".