87535661 has 4 divisors (see below), whose sum is σ = 90359424. Its totient is φ = 84711900.

The previous prime is 87535633. The next prime is 87535681. The reversal of 87535661 is 16653578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16653578 = 2 ⋅8326789.

It is a cyclic number.

It is not a de Polignac number, because 87535661 - 2⁶ = 87535597 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 (87535681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411835 + ... + 1411896.

It is an arithmetic number, because the mean of its divisors is an integer number (22589856).

Almost surely, 2^87535661 is an apocalyptic number.

It is an amenable number.

87535661 is a deficient number, since it is larger than the sum of its proper divisors (2823763).

87535661 is a wasteful number, since it uses less digits than its factorization.

87535661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823762.

The product of its digits is 151200, while the sum is 41.

The square root of 87535661 is about 9356.0494333880. The cubic root of 87535661 is about 444.0123041933.

The spelling of 87535661 in words is "eighty-seven million, five hundred thirty-five thousand, six hundred sixty-one".