87474430447 has 4 divisors (see below), whose sum is σ = 87490524616. Its totient is φ = 87458336280.

The previous prime is 87474430423. The next prime is 87474430469. The reversal of 87474430447 is 74403447478.

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

It is a cyclic number.

It is not a de Polignac number, because 87474430447 - 2¹¹ = 87474428399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87474430394 and 87474430403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87474430247) 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, 8038929 + ... + 8049802.

It is an arithmetic number, because the mean of its divisors is an integer number (21872631154).

Almost surely, 2^87474430447 is an apocalyptic number.

87474430447 is a deficient number, since it is larger than the sum of its proper divisors (16094169).

87474430447 is a wasteful number, since it uses less digits than its factorization.

87474430447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16094168.

The product of its (nonzero) digits is 8429568, while the sum is 52.

The spelling of 87474430447 in words is "eighty-seven billion, four hundred seventy-four million, four hundred thirty thousand, four hundred forty-seven".