87861505 has 8 divisors (see below), whose sum is σ = 105681024. Its totient is φ = 70124400.

The previous prime is 87861497. The next prime is 87861517. The reversal of 87861505 is 50516878.

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

It is not a de Polignac number, because 87861505 - 2³ = 87861497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18231 + ... + 22540.

It is an arithmetic number, because the mean of its divisors is an integer number (13210128).

Almost surely, 2^87861505 is an apocalyptic number.

It is an amenable number.

87861505 is a deficient number, since it is larger than the sum of its proper divisors (17819519).

87861505 is a wasteful number, since it uses less digits than its factorization.

87861505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41207.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 87861505 is about 9373.4468046712. The cubic root of 87861505 is about 444.5625545935.

The spelling of 87861505 in words is "eighty-seven million, eight hundred sixty-one thousand, five hundred five".