87889653 has 6 divisors (see below), whose sum is σ = 126951734. Its totient is φ = 58593096.

The previous prime is 87889651. The next prime is 87889661. The reversal of 87889653 is 35698878.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47858724 + 40030929 = 6918^2 + 6327^2 .

It is not a de Polignac number, because 87889653 - 2¹ = 87889651 is a prime.

It is a super-2 number, since 2×87889653² = 15449182208920818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87889653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87889651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4882750 + ... + 4882767.

Almost surely, 2^87889653 is an apocalyptic number.

It is an amenable number.

87889653 is a deficient number, since it is larger than the sum of its proper divisors (39062081).

87889653 is a wasteful number, since it uses less digits than its factorization.

87889653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765523 (or 9765520 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 87889653 is about 9374.9481598567. The cubic root of 87889653 is about 444.6100240388.

The spelling of 87889653 in words is "eighty-seven million, eight hundred eighty-nine thousand, six hundred fifty-three".