3649800217 has 4 divisors (see below), whose sum is σ = 4171200256. Its totient is φ = 3128400180.

The previous prime is 3649800211. The next prime is 3649800233. The reversal of 3649800217 is 7120089463.

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 3649800217 - 2¹¹ = 3649798169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3649800217.

It is not an unprimeable number, because it can be changed into a prime (3649800211) 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, 260700009 + ... + 260700022.

It is an arithmetic number, because the mean of its divisors is an integer number (1042800064).

Almost surely, 2^3649800217 is an apocalyptic number.

It is an amenable number.

3649800217 is a deficient number, since it is larger than the sum of its proper divisors (521400039).

3649800217 is an equidigital number, since it uses as much as digits as its factorization.

3649800217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521400038.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 3649800217 is about 60413.5764294749. The cubic root of 3649800217 is about 1539.6536322563.

The spelling of 3649800217 in words is "three billion, six hundred forty-nine million, eight hundred thousand, two hundred seventeen".