90180487 has 4 divisors (see below), whose sum is σ = 90501696. Its totient is φ = 89859280.

The previous prime is 90180473. The next prime is 90180511. The reversal of 90180487 is 78408109.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90180487 - 2¹⁹ = 89656199 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 (90180187) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 160183 + ... + 160744.

It is an arithmetic number, because the mean of its divisors is an integer number (22625424).

Almost surely, 2^90180487 is an apocalyptic number.

90180487 is a deficient number, since it is larger than the sum of its proper divisors (321209).

90180487 is a wasteful number, since it uses less digits than its factorization.

90180487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321208.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 90180487 is about 9496.3407162970. The cubic root of 90180487 is about 448.4398432548.

The spelling of 90180487 in words is "ninety million, one hundred eighty thousand, four hundred eighty-seven".