87429834647 has 4 divisors (see below), whose sum is σ = 87449606160. Its totient is φ = 87410063136.

The previous prime is 87429834641. The next prime is 87429834649. The reversal of 87429834647 is 74643892478.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74643892478 = 2 ⋅37321946239.

It is a cyclic number.

It is not a de Polignac number, because 87429834647 - 2²² = 87425640343 is a prime.

It is a super-2 number, since 2×87429834647² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87429834647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87429834641) 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, 9879122 + ... + 9887967.

It is an arithmetic number, because the mean of its divisors is an integer number (21862401540).

Almost surely, 2^87429834647 is an apocalyptic number.

87429834647 is a deficient number, since it is larger than the sum of its proper divisors (19771513).

87429834647 is a wasteful number, since it uses less digits than its factorization.

87429834647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19771512.

The product of its digits is 65028096, while the sum is 62.

The spelling of 87429834647 in words is "eighty-seven billion, four hundred twenty-nine million, eight hundred thirty-four thousand, six hundred forty-seven".