87139780234 has 8 divisors (see below), whose sum is σ = 140764260420. Its totient is φ = 40218360096.

The previous prime is 87139780223. The next prime is 87139780253. The reversal of 87139780234 is 43208793178.

It can be written as a sum of positive squares in 2 ways, for example, as 82859349609 + 4280430625 = 287853^2 + 65425^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675764979 + ... + 1675765030.

Almost surely, 2^87139780234 is an apocalyptic number.

87139780234 is a deficient number, since it is larger than the sum of its proper divisors (53624480186).

87139780234 is a wasteful number, since it uses less digits than its factorization.

87139780234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351530024.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 87139780234 in words is "eighty-seven billion, one hundred thirty-nine million, seven hundred eighty thousand, two hundred thirty-four".