2198024779 has 4 divisors (see below), whose sum is σ = 2200182840. Its totient is φ = 2195866720.

The previous prime is 2198024761. The next prime is 2198024783. The reversal of 2198024779 is 9774208912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2198024779 - 2⁹ = 2198024267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2198024729) 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, 1077502 + ... + 1079539.

It is an arithmetic number, because the mean of its divisors is an integer number (550045710).

Almost surely, 2^2198024779 is an apocalyptic number.

2198024779 is a deficient number, since it is larger than the sum of its proper divisors (2158061).

2198024779 is a wasteful number, since it uses less digits than its factorization.

2198024779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158060.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 2198024779 is about 46883.0969433548. The cubic root of 2198024779 is about 1300.2020946168.

The spelling of 2198024779 in words is "two billion, one hundred ninety-eight million, twenty-four thousand, seven hundred seventy-nine".