87930805 has 8 divisors (see below), whose sum is σ = 105709752. Its totient is φ = 70216128.

The previous prime is 87930793. The next prime is 87930809. The reversal of 87930805 is 50803978.

It can be written as a sum of positive squares in 4 ways, for example, as 208849 + 87721956 = 457^2 + 9366^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87930805 - 2¹³ = 87922613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87930809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13002 + ... + 18571.

It is an arithmetic number, because the mean of its divisors is an integer number (13213719).

Almost surely, 2^87930805 is an apocalyptic number.

It is an amenable number.

87930805 is a deficient number, since it is larger than the sum of its proper divisors (17778947).

87930805 is a wasteful number, since it uses less digits than its factorization.

87930805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32135.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 87930805 is about 9377.1426884739. The cubic root of 87930805 is about 444.6794054968.

It can be divided in two parts, 879 and 30805, that added together give a square (31684 = 178²).

The spelling of 87930805 in words is "eighty-seven million, nine hundred thirty thousand, eight hundred five".