856611487 has 8 divisors (see below), whose sum is σ = 909620496. Its totient is φ = 803893632.

The previous prime is 856611479. The next prime is 856611527. The reversal of 856611487 is 784116658.

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 856611487 - 2³ = 856611479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856611407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66708 + ... + 78505.

It is an arithmetic number, because the mean of its divisors is an integer number (113702562).

Almost surely, 2^856611487 is an apocalyptic number.

856611487 is a deficient number, since it is larger than the sum of its proper divisors (53009009).

856611487 is a wasteful number, since it uses less digits than its factorization.

856611487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145577.

The product of its digits is 322560, while the sum is 46.

The square root of 856611487 is about 29267.9259087486. The cubic root of 856611487 is about 949.7179169882.

The spelling of 856611487 in words is "eight hundred fifty-six million, six hundred eleven thousand, four hundred eighty-seven".