87478304797 has 4 divisors (see below), whose sum is σ = 94207405180. Its totient is φ = 80749204416.

The previous prime is 87478304791. The next prime is 87478304819. The reversal of 87478304797 is 79740387478.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55668155481 + 31810149316 = 235941^2 + 178354^2 .

It is a cyclic number.

It is not a de Polignac number, because 87478304797 - 2¹¹ = 87478302749 is a prime.

It is a super-2 number, since 2×87478304797² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87478304791) 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, 3364550172 + ... + 3364550197.

It is an arithmetic number, because the mean of its divisors is an integer number (23551851295).

Almost surely, 2^87478304797 is an apocalyptic number.

It is an amenable number.

87478304797 is a deficient number, since it is larger than the sum of its proper divisors (6729100383).

87478304797 is a wasteful number, since it uses less digits than its factorization.

87478304797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6729100382.

The product of its (nonzero) digits is 66382848, while the sum is 64.

The spelling of 87478304797 in words is "eighty-seven billion, four hundred seventy-eight million, three hundred four thousand, seven hundred ninety-seven".