1217518964 has 6 divisors (see below), whose sum is σ = 2130658194. Its totient is φ = 608759480.

The previous prime is 1217518963. The next prime is 1217518987. The reversal of 1217518964 is 4698157121.

It can be written as a sum of positive squares in only one way, i.e., 918574864 + 298944100 = 30308^2 + 17290^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217518963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152189867 + ... + 152189874.

It is an arithmetic number, because the mean of its divisors is an integer number (355109699).

Almost surely, 2^1217518964 is an apocalyptic number.

It is an amenable number.

1217518964 is a deficient number, since it is larger than the sum of its proper divisors (913139230).

1217518964 is a wasteful number, since it uses less digits than its factorization.

1217518964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304379745 (or 304379743 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 1217518964 is about 34892.9643911205. The cubic root of 1217518964 is about 1067.8049050510.

The spelling of 1217518964 in words is "one billion, two hundred seventeen million, five hundred eighteen thousand, nine hundred sixty-four".