1223537864 has 8 divisors (see below), whose sum is σ = 2294133510. Its totient is φ = 611768928.

The previous prime is 1223537863. The next prime is 1223537893. The reversal of 1223537864 is 4687353221.

It can be written as a sum of positive squares in only one way, i.e., 1153145764 + 70392100 = 33958^2 + 8390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1223537863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76471109 + ... + 76471124.

Almost surely, 2^1223537864 is an apocalyptic number.

It is an amenable number.

1223537864 is a deficient number, since it is larger than the sum of its proper divisors (1070595646).

1223537864 is a wasteful number, since it uses less digits than its factorization.

1223537864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152942239 (or 152942235 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 1223537864 is about 34979.1061063601. The cubic root of 1223537864 is about 1069.5616057169.

The spelling of 1223537864 in words is "one billion, two hundred twenty-three million, five hundred thirty-seven thousand, eight hundred sixty-four".