84661563 has 24 divisors (see below), whose sum is σ = 131861520. Its totient is φ = 48175680.

The previous prime is 84661561. The next prime is 84661567. The reversal of 84661563 is 36516648.

It is not a de Polignac number, because 84661563 - 2¹ = 84661561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84661561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38473 + ... + 40613.

It is an arithmetic number, because the mean of its divisors is an integer number (5494230).

Almost surely, 2^84661563 is an apocalyptic number.

84661563 is a deficient number, since it is larger than the sum of its proper divisors (47199957).

84661563 is a wasteful number, since it uses less digits than its factorization.

84661563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427 (or 2420 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 84661563 is about 9201.1718275446. The cubic root of 84661563 is about 439.0986420513.

The spelling of 84661563 in words is "eighty-four million, six hundred sixty-one thousand, five hundred sixty-three".