1213632463 has 4 divisors (see below), whose sum is σ = 1225648728. Its totient is φ = 1201616200.

The previous prime is 1213632457. The next prime is 1213632481. The reversal of 1213632463 is 3642363121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3642363121 = 967 ⋅3766663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213632463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213632403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6007981 + ... + 6008182.

It is an arithmetic number, because the mean of its divisors is an integer number (306412182).

Almost surely, 2^1213632463 is an apocalyptic number.

1213632463 is a deficient number, since it is larger than the sum of its proper divisors (12016265).

1213632463 is a wasteful number, since it uses less digits than its factorization.

1213632463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016264.

The product of its digits is 15552, while the sum is 31.

The square root of 1213632463 is about 34837.2281187812. The cubic root of 1213632463 is about 1066.6674967550.

Adding to 1213632463 its reverse (3642363121), we get a palindrome (4855995584).

The spelling of 1213632463 in words is "one billion, two hundred thirteen million, six hundred thirty-two thousand, four hundred sixty-three".