2720378497 has 4 divisors (see below), whose sum is σ = 2730199636. Its totient is φ = 2710557360.

The previous prime is 2720378477. The next prime is 2720378513. The reversal of 2720378497 is 7948730272.

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

It can be written as a sum of positive squares in 2 ways, for example, as 295702416 + 2424676081 = 17196^2 + 49241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720378497 - 2¹⁹ = 2719854209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720378497.

It is not an unprimeable number, because it can be changed into a prime (2720378477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4910154 + ... + 4910707.

It is an arithmetic number, because the mean of its divisors is an integer number (682549909).

Almost surely, 2^2720378497 is an apocalyptic number.

It is an amenable number.

2720378497 is a deficient number, since it is larger than the sum of its proper divisors (9821139).

2720378497 is an equidigital number, since it uses as much as digits as its factorization.

2720378497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821138.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 2720378497 is about 52157.2477897368. The cubic root of 2720378497 is about 1395.9711547106.

The spelling of 2720378497 in words is "two billion, seven hundred twenty million, three hundred seventy-eight thousand, four hundred ninety-seven".