87900005 has 4 divisors (see below), whose sum is σ = 105480012. Its totient is φ = 70320000.

The previous prime is 87899993. The next prime is 87900019. The reversal of 87900005 is 50000978.

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 11826721 + 76073284 = 3439^2 + 8722^2 .

It is not a de Polignac number, because 87900005 - 2¹⁶ = 87834469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8789996 + ... + 8790005.

It is an arithmetic number, because the mean of its divisors is an integer number (26370003).

Almost surely, 2^87900005 is an apocalyptic number.

It is an amenable number.

87900005 is a deficient number, since it is larger than the sum of its proper divisors (17580007).

87900005 is a wasteful number, since it uses less digits than its factorization.

87900005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17580006.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 87900005 is about 9375.5002533198. The cubic root of 87900005 is about 444.6274793445.

It can be divided in two parts, 8790000 and 5, that multiplied together give a triangular number (43950000 = T₉₃₇₅).

The spelling of 87900005 in words is "eighty-seven million, nine hundred thousand, five".