863632449 has 28 divisors (see below), whose sum is σ = 1316151252. Its totient is φ = 566287200.

The previous prime is 863632423. The next prime is 863632481. The reversal of 863632449 is 944236368.

863632449 is a `hidden beast` number, since 8 + 6 + 3 + 632 + 4 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 448084224 + 415548225 = 21168^2 + 20385^2 .

It is not a de Polignac number, because 863632449 - 2¹⁷ = 863501377 is a prime.

It is a super-2 number, since 2×863632449² = 1491722013931475202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (863632489) 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 27 ways as a sum of consecutive naturals, for example, 34759 + ... + 54179.

Almost surely, 2^863632449 is an apocalyptic number.

It is an amenable number.

863632449 is a deficient number, since it is larger than the sum of its proper divisors (452518803).

863632449 is an equidigital number, since it uses as much as digits as its factorization.

863632449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19500 (or 19485 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 863632449 is about 29387.6240788533. The cubic root of 863632449 is about 952.3055539591.

The spelling of 863632449 in words is "eight hundred sixty-three million, six hundred thirty-two thousand, four hundred forty-nine".