87090501 has 16 divisors (see below), whose sum is σ = 122135040. Its totient is φ = 55124160.

The previous prime is 87090499. The next prime is 87090511. The reversal of 87090501 is 10509078.

It is not a de Polignac number, because 87090501 - 2¹ = 87090499 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87090511) 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, 3906 + ... + 13763.

It is an arithmetic number, because the mean of its divisors is an integer number (7633440).

Almost surely, 2^87090501 is an apocalyptic number.

It is an amenable number.

87090501 is a deficient number, since it is larger than the sum of its proper divisors (35044539).

87090501 is a wasteful number, since it uses less digits than its factorization.

87090501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17756.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 87090501 is about 9332.2291549233. The cubic root of 87090501 is about 443.2583542271.

Adding to 87090501 its reverse (10509078), we get a palindrome (97599579).

It can be divided in two parts, 8709050 and 1, that added together give a triangular number (8709051 = T₄₁₇₃).

The spelling of 87090501 in words is "eighty-seven million, ninety thousand, five hundred one".