1213633946 has 8 divisors (see below), whose sum is σ = 2080515360. Its totient is φ = 520128828.

The previous prime is 1213633943. The next prime is 1213633957. The reversal of 1213633946 is 6493363121.

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

It is not an unprimeable number, because it can be changed into a prime (1213633943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43344056 + ... + 43344083.

It is an arithmetic number, because the mean of its divisors is an integer number (260064420).

Almost surely, 2^1213633946 is an apocalyptic number.

1213633946 is a deficient number, since it is larger than the sum of its proper divisors (866881414).

1213633946 is an equidigital number, since it uses as much as digits as its factorization.

1213633946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86688148.

The product of its digits is 69984, while the sum is 38.

The square root of 1213633946 is about 34837.2494034762. The cubic root of 1213633946 is about 1066.6679312268.

The spelling of 1213633946 in words is "one billion, two hundred thirteen million, six hundred thirty-three thousand, nine hundred forty-six".