2620721347 has 2 divisors, whose sum is σ = 2620721348. Its totient is φ = 2620721346.

The previous prime is 2620721339. The next prime is 2620721351. The reversal of 2620721347 is 7431270262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2620721347 - 2³ = 2620721339 is a prime.

It is not a weakly prime, because it can be changed into another prime (2620721947) 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 as a sum of consecutive naturals, namely, 1310360673 + 1310360674.

It is an arithmetic number, because the mean of its divisors is an integer number (1310360674).

Almost surely, 2^2620721347 is an apocalyptic number.

2620721347 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620721347 is an equidigital number, since it uses as much as digits as its factorization.

2620721347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 2620721347 is about 51192.9814232381. The cubic root of 2620721347 is about 1378.7121898642.

The spelling of 2620721347 in words is "two billion, six hundred twenty million, seven hundred twenty-one thousand, three hundred forty-seven".