2779247439897 has 4 divisors (see below), whose sum is σ = 3705663253200. Its totient is φ = 1852831626596.

The previous prime is 2779247439887. The next prime is 2779247439907. The reversal of 2779247439897 is 7989347429772.

2779247439897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (2779247439887) and next prime (2779247439907).

It is a cyclic number.

It is not a de Polignac number, because 2779247439897 - 2⁶ = 2779247439833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2779247439847) 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, 463207906647 + ... + 463207906652.

It is an arithmetic number, because the mean of its divisors is an integer number (926415813300).

Almost surely, 2^{2779247439897} is an apocalyptic number.

It is an amenable number.

2779247439897 is a deficient number, since it is larger than the sum of its proper divisors (926415813303).

2779247439897 is an equidigital number, since it uses as much as digits as its factorization.

2779247439897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926415813302.

The product of its digits is 2688505344, while the sum is 78.

The spelling of 2779247439897 in words is "two trillion, seven hundred seventy-nine billion, two hundred forty-seven million, four hundred thirty-nine thousand, eight hundred ninety-seven".