802121617 has 8 divisors (see below), whose sum is σ = 877125312. Its totient is φ = 727465200.

The previous prime is 802121611. The next prime is 802121627. The reversal of 802121617 is 716121208.

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

It is not a de Polignac number, because 802121617 - 2³ = 802121609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (802121611) 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 7 ways as a sum of consecutive naturals, for example, 81973 + ... + 91234.

It is an arithmetic number, because the mean of its divisors is an integer number (109640664).

Almost surely, 2^802121617 is an apocalyptic number.

It is an amenable number.

802121617 is a deficient number, since it is larger than the sum of its proper divisors (75003695).

802121617 is a wasteful number, since it uses less digits than its factorization.

802121617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173639.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 802121617 is about 28321.7516583985. The cubic root of 802121617 is about 929.1376818198.

The spelling of 802121617 in words is "eight hundred two million, one hundred twenty-one thousand, six hundred seventeen".