87234661 has 4 divisors (see below), whose sum is σ = 88880652. Its totient is φ = 85588672.

The previous prime is 87234619. The next prime is 87234671. The reversal of 87234661 is 16643278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59197636 + 28037025 = 7694^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 87234661 - 2⁷ = 87234533 is a prime.

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 87234661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87234601) 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, 822916 + ... + 823021.

It is an arithmetic number, because the mean of its divisors is an integer number (22220163).

Almost surely, 2^87234661 is an apocalyptic number.

It is an amenable number.

87234661 is a deficient number, since it is larger than the sum of its proper divisors (1645991).

87234661 is a wasteful number, since it uses less digits than its factorization.

87234661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645990.

The product of its digits is 48384, while the sum is 37.

The square root of 87234661 is about 9339.9497321988. The cubic root of 87234661 is about 443.5027930513.

The spelling of 87234661 in words is "eighty-seven million, two hundred thirty-four thousand, six hundred sixty-one".