87240173047 has 4 divisors (see below), whose sum is σ = 87332884056. Its totient is φ = 87147462040.

The previous prime is 87240173003. The next prime is 87240173063. The reversal of 87240173047 is 74037104278.

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 87240173047 - 2²⁷ = 87105955319 is a prime.

It is a super-2 number, since 2×87240173047² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87240172994 and 87240173012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87240173077) 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, 46354093 + ... + 46355974.

It is an arithmetic number, because the mean of its divisors is an integer number (21833221014).

Almost surely, 2^87240173047 is an apocalyptic number.

87240173047 is a deficient number, since it is larger than the sum of its proper divisors (92711009).

87240173047 is an equidigital number, since it uses as much as digits as its factorization.

87240173047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92711008.

The product of its (nonzero) digits is 263424, while the sum is 43.

The spelling of 87240173047 in words is "eighty-seven billion, two hundred forty million, one hundred seventy-three thousand, forty-seven".