87231029 has 4 divisors (see below), whose sum is σ = 92362284. Its totient is φ = 82099776.

The previous prime is 87231017. The next prime is 87231031. The reversal of 87231029 is 92013278.

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 70174129 + 17056900 = 8377^2 + 4130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87231029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87230986 and 87231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87231049) 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, 2565602 + ... + 2565635.

It is an arithmetic number, because the mean of its divisors is an integer number (23090571).

Almost surely, 2^87231029 is an apocalyptic number.

It is an amenable number.

87231029 is a deficient number, since it is larger than the sum of its proper divisors (5131255).

87231029 is a wasteful number, since it uses less digits than its factorization.

87231029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131254.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 87231029 is about 9339.7552965803. The cubic root of 87231029 is about 443.4966379119.

The spelling of 87231029 in words is "eighty-seven million, two hundred thirty-one thousand, twenty-nine".