87439221107 has 4 divisors (see below), whose sum is σ = 99930538416. Its totient is φ = 74947903800.

The previous prime is 87439221071. The next prime is 87439221109. The reversal of 87439221107 is 70112293478.

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

It is not a de Polignac number, because 87439221107 - 2⁶ = 87439221043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87439221109) 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, 6245658644 + ... + 6245658657.

It is an arithmetic number, because the mean of its divisors is an integer number (24982634604).

Almost surely, 2^87439221107 is an apocalyptic number.

87439221107 is a deficient number, since it is larger than the sum of its proper divisors (12491317309).

87439221107 is a wasteful number, since it uses less digits than its factorization.

87439221107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491317308.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 87439221107 in words is "eighty-seven billion, four hundred thirty-nine million, two hundred twenty-one thousand, one hundred seven".