1223634631 has 4 divisors (see below), whose sum is σ = 1223773200. Its totient is φ = 1223496064.

The previous prime is 1223634593. The next prime is 1223634641. The reversal of 1223634631 is 1364363221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1364363221 = 13 ⋅104951017.

It is a cyclic number.

It is not a de Polignac number, because 1223634631 - 2⁹ = 1223634119 is a prime.

It is a super-2 number, since 2×1223634631² = 2994563420365012322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223634593 and 1223634602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223634641) 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, 55066 + ... + 74023.

It is an arithmetic number, because the mean of its divisors is an integer number (305943300).

Almost surely, 2^1223634631 is an apocalyptic number.

1223634631 is a deficient number, since it is larger than the sum of its proper divisors (138569).

1223634631 is an equidigital number, since it uses as much as digits as its factorization.

1223634631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138568.

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

The square root of 1223634631 is about 34980.4892904602. The cubic root of 1223634631 is about 1069.5898014223.

Adding to 1223634631 its reverse (1364363221), we get a palindrome (2587997852).

The spelling of 1223634631 in words is "one billion, two hundred twenty-three million, six hundred thirty-four thousand, six hundred thirty-one".