487801861 has 4 divisors (see below), whose sum is σ = 498180672. Its totient is φ = 477423052.

The previous prime is 487801807. The next prime is 487801883. The reversal of 487801861 is 168108784.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 487801861 - 2¹¹ = 487799813 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 (487801891) 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, 5189335 + ... + 5189428.

It is an arithmetic number, because the mean of its divisors is an integer number (124545168).

Almost surely, 2^487801861 is an apocalyptic number.

It is an amenable number.

487801861 is a deficient number, since it is larger than the sum of its proper divisors (10378811).

487801861 is a wasteful number, since it uses less digits than its factorization.

487801861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378810.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 487801861 is about 22086.2369135170. The cubic root of 487801861 is about 787.1928684235.

The spelling of 487801861 in words is "four hundred eighty-seven million, eight hundred one thousand, eight hundred sixty-one".