87663653 has 24 divisors (see below), whose sum is σ = 111345984. Its totient is φ = 67605120.

The previous prime is 87663647. The next prime is 87663659. The reversal of 87663653 is 35636678.

It is an interprime number because it is at equal distance from previous prime (87663647) and next prime (87663659).

It is not a de Polignac number, because 87663653 - 2⁴ = 87663637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87663659) 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, 903701 + ... + 903797.

It is an arithmetic number, because the mean of its divisors is an integer number (4639416).

Almost surely, 2^87663653 is an apocalyptic number.

It is an amenable number.

87663653 is a deficient number, since it is larger than the sum of its proper divisors (23682331).

87663653 is an frugal number, since it uses more digits than its factorization.

87663653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 115 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 87663653 is about 9362.8870013474. The cubic root of 87663653 is about 444.2286059317.

The spelling of 87663653 in words is "eighty-seven million, six hundred sixty-three thousand, six hundred fifty-three".