1617421673 has 8 divisors (see below), whose sum is σ = 1849814400. Its totient is φ = 1385362080.

The previous prime is 1617421657. The next prime is 1617421681. The reversal of 1617421673 is 3761247161.

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 1617421673 - 2⁴ = 1617421657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1617921673) 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, 72788 + ... + 92373.

It is an arithmetic number, because the mean of its divisors is an integer number (231226800).

Almost surely, 2^1617421673 is an apocalyptic number.

It is an amenable number.

1617421673 is a deficient number, since it is larger than the sum of its proper divisors (232392727).

1617421673 is a wasteful number, since it uses less digits than its factorization.

1617421673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166567.

The product of its digits is 42336, while the sum is 38.

The square root of 1617421673 is about 40217.1813159500. The cubic root of 1617421673 is about 1173.8368868786.

The spelling of 1617421673 in words is "one billion, six hundred seventeen million, four hundred twenty-one thousand, six hundred seventy-three".