87471906 has 8 divisors (see below), whose sum is σ = 174943824. Its totient is φ = 29157300.

The previous prime is 87471899. The next prime is 87471911. The reversal of 87471906 is 60917478.

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

87471906 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7289320 + ... + 7289331.

It is an arithmetic number, because the mean of its divisors is an integer number (21867978).

Almost surely, 2^87471906 is an apocalyptic number.

87471906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87471906 is a wasteful number, since it uses less digits than its factorization.

87471906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14578656.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 87471906 is about 9352.6416589111. The cubic root of 87471906 is about 443.9044819280.

The spelling of 87471906 in words is "eighty-seven million, four hundred seventy-one thousand, nine hundred six".