87234721013 has 8 divisors (see below), whose sum is σ = 95218545216. Its totient is φ = 79259796000.

The previous prime is 87234721003. The next prime is 87234721097. The reversal of 87234721013 is 31012743278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87234721013 - 2⁶ = 87234720949 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 (87234721003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2204288 + ... + 2243513.

It is an arithmetic number, because the mean of its divisors is an integer number (11902318152).

Almost surely, 2^87234721013 is an apocalyptic number.

It is an amenable number.

87234721013 is a deficient number, since it is larger than the sum of its proper divisors (7983824203).

87234721013 is a wasteful number, since it uses less digits than its factorization.

87234721013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449595.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 87234721013 in words is "eighty-seven billion, two hundred thirty-four million, seven hundred twenty-one thousand, thirteen".