2198984729 has 4 divisors (see below), whose sum is σ = 2199095040. Its totient is φ = 2198874420.

The previous prime is 2198984699. The next prime is 2198984771. The reversal of 2198984729 is 9274898912.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2198984729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197984729) 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, 15977 + ... + 68214.

It is an arithmetic number, because the mean of its divisors is an integer number (549773760).

Almost surely, 2^2198984729 is an apocalyptic number.

It is an amenable number.

2198984729 is a deficient number, since it is larger than the sum of its proper divisors (110311).

2198984729 is an equidigital number, since it uses as much as digits as its factorization.

2198984729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110310.

The product of its digits is 5225472, while the sum is 59.

The square root of 2198984729 is about 46893.3335240735. Note that the first 3 decimals coincide. The cubic root of 2198984729 is about 1300.3913474643.

The spelling of 2198984729 in words is "two billion, one hundred ninety-eight million, nine hundred eighty-four thousand, seven hundred twenty-nine".