87404605 has 8 divisors (see below), whose sum is σ = 105060312. Its totient is φ = 69807168.

The previous prime is 87404587. The next prime is 87404609. The reversal of 87404605 is 50640478.

It can be written as a sum of positive squares in 4 ways, for example, as 2377764 + 85026841 = 1542^2 + 9221^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87404605 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 (87404609) 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, 11194 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (13132539).

Almost surely, 2^87404605 is an apocalyptic number.

It is an amenable number.

87404605 is a deficient number, since it is larger than the sum of its proper divisors (17655707).

87404605 is a wasteful number, since it uses less digits than its factorization.

87404605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29135.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 87404605 is about 9349.0429991524. The cubic root of 87404605 is about 443.7906058194.

The spelling of 87404605 in words is "eighty-seven million, four hundred four thousand, six hundred five".