2798479781 has 4 divisors (see below), whose sum is σ = 2858021952. Its totient is φ = 2738937612.

The previous prime is 2798479763. The next prime is 2798479823. The reversal of 2798479781 is 1879748972.

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 2798479781 - 2²² = 2794285477 is a prime.

It is a super-2 number, since 2×2798479781² = 15662978169331615922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798479721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29771015 + ... + 29771108.

It is an arithmetic number, because the mean of its divisors is an integer number (714505488).

Almost surely, 2^2798479781 is an apocalyptic number.

It is an amenable number.

2798479781 is a deficient number, since it is larger than the sum of its proper divisors (59542171).

2798479781 is an equidigital number, since it uses as much as digits as its factorization.

2798479781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59542170.

The product of its digits is 14224896, while the sum is 62.

The square root of 2798479781 is about 52900.6595516540. The cubic root of 2798479781 is about 1409.2046183911.

The spelling of 2798479781 in words is "two billion, seven hundred ninety-eight million, four hundred seventy-nine thousand, seven hundred eighty-one".