1213686875 has 40 divisors (see below), whose sum is σ = 1571496960. Its totient is φ = 936468000.

The previous prime is 1213686841. The next prime is 1213686893. The reversal of 1213686875 is 5786863121.

It is not a de Polignac number, because 1213686875 - 2²⁰ = 1212638299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2320364 + ... + 2320886.

It is an arithmetic number, because the mean of its divisors is an integer number (39287424).

Almost surely, 2^1213686875 is an apocalyptic number.

1213686875 is a deficient number, since it is larger than the sum of its proper divisors (357810085).

1213686875 is an frugal number, since it uses more digits than its factorization.

1213686875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 654 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 1213686875 is about 34838.0090562018. The cubic root of 1213686875 is about 1066.6834375076.

The spelling of 1213686875 in words is "one billion, two hundred thirteen million, six hundred eighty-six thousand, eight hundred seventy-five".