1231608463 has 8 divisors (see below), whose sum is σ = 1240147328. Its totient is φ = 1223092224.

The previous prime is 1231608457. The next prime is 1231608473. The reversal of 1231608463 is 3648061321.

It is a happy number.

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-1231608463 is a prime.

It is a super-2 number, since 2×1231608463² = 3033718812266444738, 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 (1231608473) 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, 111895 + ... + 122407.

It is an arithmetic number, because the mean of its divisors is an integer number (155018416).

Almost surely, 2^1231608463 is an apocalyptic number.

1231608463 is a deficient number, since it is larger than the sum of its proper divisors (8538865).

1231608463 is a wasteful number, since it uses less digits than its factorization.

1231608463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11313.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1231608463 is about 35094.2796335813. The cubic root of 1231608463 is about 1071.9081051838.

Adding to 1231608463 its reverse (3648061321), we get a palindrome (4879669784).

The spelling of 1231608463 in words is "one billion, two hundred thirty-one million, six hundred eight thousand, four hundred sixty-three".