617999487 has 16 divisors (see below), whose sum is σ = 997108992. Its totient is φ = 332369280.

The previous prime is 617999471. The next prime is 617999509. The reversal of 617999487 is 784999716.

It is not a de Polignac number, because 617999487 - 2⁴ = 617999471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 617999487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617999087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865189 + ... + 865902.

It is an arithmetic number, because the mean of its divisors is an integer number (62319312).

Almost surely, 2^617999487 is an apocalyptic number.

617999487 is a deficient number, since it is larger than the sum of its proper divisors (379109505).

617999487 is a wasteful number, since it uses less digits than its factorization.

617999487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731118.

The product of its digits is 6858432, while the sum is 60.

The square root of 617999487 is about 24859.5954713668. The cubic root of 617999487 is about 851.7837912115.

The spelling of 617999487 in words is "six hundred seventeen million, nine hundred ninety-nine thousand, four hundred eighty-seven".