87210503834 has 4 divisors (see below), whose sum is σ = 130815755754. Its totient is φ = 43605251916.

The previous prime is 87210503827. The next prime is 87210503857. The reversal of 87210503834 is 43830501278.

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

It can be written as a sum of positive squares in only one way, i.e., 47269282225 + 39941221609 = 217415^2 + 199853^2 .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87210503791 and 87210503800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21802625957 + ... + 21802625960.

Almost surely, 2^87210503834 is an apocalyptic number.

87210503834 is a deficient number, since it is larger than the sum of its proper divisors (43605251920).

87210503834 is a wasteful number, since it uses less digits than its factorization.

87210503834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43605251919.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 87210503834 in words is "eighty-seven billion, two hundred ten million, five hundred three thousand, eight hundred thirty-four".