87133939609 has 4 divisors (see below), whose sum is σ = 87718731300. Its totient is φ = 86549147920.

The previous prime is 87133939591. The next prime is 87133939649. The reversal of 87133939609 is 90693933178.

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 23353952400 + 63779987209 = 152820^2 + 252547^2 .

It is a cyclic number.

It is not a de Polignac number, because 87133939609 - 2²³ = 87125551001 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87133939649) 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, 292395622 + ... + 292395919.

It is an arithmetic number, because the mean of its divisors is an integer number (21929682825).

Almost surely, 2^87133939609 is an apocalyptic number.

It is an amenable number.

87133939609 is a deficient number, since it is larger than the sum of its proper divisors (584791691).

87133939609 is a wasteful number, since it uses less digits than its factorization.

87133939609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584791690.

The product of its (nonzero) digits is 6613488, while the sum is 58.

The spelling of 87133939609 in words is "eighty-seven billion, one hundred thirty-three million, nine hundred thirty-nine thousand, six hundred nine".