617442621 has 8 divisors (see below), whose sum is σ = 823372704. Its totient is φ = 411570480.

The previous prime is 617442607. The next prime is 617442689. The reversal of 617442621 is 126244716.

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

It is not a de Polignac number, because 617442621 - 2⁵ = 617442589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617442691) 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, 29235 + ... + 45711.

It is an arithmetic number, because the mean of its divisors is an integer number (102921588).

Almost surely, 2^617442621 is an apocalyptic number.

It is an amenable number.

617442621 is a deficient number, since it is larger than the sum of its proper divisors (205930083).

617442621 is a wasteful number, since it uses less digits than its factorization.

617442621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28971.

The product of its digits is 16128, while the sum is 33.

The square root of 617442621 is about 24848.3927246814. The cubic root of 617442621 is about 851.5278729983.

The spelling of 617442621 in words is "six hundred seventeen million, four hundred forty-two thousand, six hundred twenty-one".