861027487 has 8 divisors (see below), whose sum is σ = 891622800. Its totient is φ = 830492544.

The previous prime is 861027473. The next prime is 861027521. The reversal of 861027487 is 784720168.

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

It is a cyclic number.

It is not a de Polignac number, because 861027487 - 2⁷ = 861027359 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 (861037487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14983 + ... + 44119.

It is an arithmetic number, because the mean of its divisors is an integer number (111452850).

Almost surely, 2^861027487 is an apocalyptic number.

861027487 is a deficient number, since it is larger than the sum of its proper divisors (30595313).

861027487 is a wasteful number, since it uses less digits than its factorization.

861027487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30185.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 861027487 is about 29343.2698757313. The cubic root of 861027487 is about 951.3471145375.

The spelling of 861027487 in words is "eight hundred sixty-one million, twenty-seven thousand, four hundred eighty-seven".