83587661 has 4 divisors (see below), whose sum is σ = 84765024. Its totient is φ = 82410300.

The previous prime is 83587649. The next prime is 83587663. The reversal of 83587661 is 16678538.

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.

It is a cyclic number.

It is not a de Polignac number, because 83587661 - 2⁶ = 83587597 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 (83587663) 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, 588575 + ... + 588716.

It is an arithmetic number, because the mean of its divisors is an integer number (21191256).

Almost surely, 2^83587661 is an apocalyptic number.

It is an amenable number.

83587661 is a deficient number, since it is larger than the sum of its proper divisors (1177363).

83587661 is a wasteful number, since it uses less digits than its factorization.

83587661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177362.

The product of its digits is 241920, while the sum is 44.

The square root of 83587661 is about 9142.6287795141. The cubic root of 83587661 is about 437.2341324521.

It can be divided in two parts, 83587 and 661, that added together give a palindrome (84248).

The spelling of 83587661 in words is "eighty-three million, five hundred eighty-seven thousand, six hundred sixty-one".