2988221797 has 4 divisors (see below), whose sum is σ = 3259878336. Its totient is φ = 2716565260.

The previous prime is 2988221791. The next prime is 2988221837. The reversal of 2988221797 is 7971228892.

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 a de Polignac number, because none of the positive numbers 2^k-2988221797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2988221791) 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, 135828253 + ... + 135828274.

It is an arithmetic number, because the mean of its divisors is an integer number (814969584).

Almost surely, 2^2988221797 is an apocalyptic number.

It is an amenable number.

2988221797 is a deficient number, since it is larger than the sum of its proper divisors (271656539).

2988221797 is a wasteful number, since it uses less digits than its factorization.

2988221797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271656538.

The product of its digits is 2032128, while the sum is 55.

The square root of 2988221797 is about 54664.6302191829. The cubic root of 2988221797 is about 1440.3596383433.

It can be divided in two parts, 2988 and 221797, that added together give a triangular number (224785 = T₆₇₀).

The spelling of 2988221797 in words is "two billion, nine hundred eighty-eight million, two hundred twenty-one thousand, seven hundred ninety-seven".