823243631 has 8 divisors (see below), whose sum is σ = 941153280. Its totient is φ = 705409848.

The previous prime is 823243621. The next prime is 823243639. The reversal of 823243631 is 136342328.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823243631 is a prime.

It is a super-2 number, since 2×823243631² = 1355460151964128322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823243639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6590 + ... + 41108.

It is an arithmetic number, because the mean of its divisors is an integer number (117644160).

Almost surely, 2^823243631 is an apocalyptic number.

823243631 is a deficient number, since it is larger than the sum of its proper divisors (117909649).

823243631 is a wasteful number, since it uses less digits than its factorization.

823243631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37933.

The product of its digits is 20736, while the sum is 32.

The square root of 823243631 is about 28692.2224827565. Note that the first 3 decimals coincide. The cubic root of 823243631 is about 937.2226876621. Note that the first 3 decimals are identical.

Adding to 823243631 its reverse (136342328), we get a palindrome (959585959).

The spelling of 823243631 in words is "eight hundred twenty-three million, two hundred forty-three thousand, six hundred thirty-one".