641098617 has 4 divisors (see below), whose sum is σ = 854798160. Its totient is φ = 427399076.

The previous prime is 641098613. The next prime is 641098637. The reversal of 641098617 is 716890146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641098617 - 2² = 641098613 is a prime.

It is a super-3 number, since 3×641098617³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (641098613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106849767 + ... + 106849772.

It is an arithmetic number, because the mean of its divisors is an integer number (213699540).

Almost surely, 2^641098617 is an apocalyptic number.

It is an amenable number.

641098617 is a deficient number, since it is larger than the sum of its proper divisors (213699543).

641098617 is a wasteful number, since it uses less digits than its factorization.

641098617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213699542.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 641098617 is about 25319.9252960983. The cubic root of 641098617 is about 862.2666979993.

The spelling of 641098617 in words is "six hundred forty-one million, ninety-eight thousand, six hundred seventeen".