87539901 has 16 divisors (see below), whose sum is σ = 117926400. Its totient is φ = 57760560.

The previous prime is 87539843. The next prime is 87539911. The reversal of 87539901 is 10993578.

It is a happy number.

It is not a de Polignac number, because 87539901 - 2¹⁰ = 87538877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87539911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197386 + ... + 197828.

It is an arithmetic number, because the mean of its divisors is an integer number (7370400).

Almost surely, 2^87539901 is an apocalyptic number.

It is an amenable number.

87539901 is a deficient number, since it is larger than the sum of its proper divisors (30386499).

87539901 is a wasteful number, since it uses less digits than its factorization.

87539901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 87539901 is about 9356.2760220079. The cubic root of 87539901 is about 444.0194730117.

The spelling of 87539901 in words is "eighty-seven million, five hundred thirty-nine thousand, nine hundred one".