3420725557 has 2 divisors, whose sum is σ = 3420725558. Its totient is φ = 3420725556.

The previous prime is 3420725521. The next prime is 3420725573. The reversal of 3420725557 is 7555270243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2597838961 + 822886596 = 50969^2 + 28686^2 .

It is an emirp because it is prime and its reverse (7555270243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3420725557 - 2³¹ = 1273241909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3420723557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710362778 + 1710362779.

It is an arithmetic number, because the mean of its divisors is an integer number (1710362779).

Almost surely, 2^3420725557 is an apocalyptic number.

It is an amenable number.

3420725557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420725557 is an equidigital number, since it uses as much as digits as its factorization.

3420725557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294000, while the sum is 40.

The square root of 3420725557 is about 58486.9691213351. The cubic root of 3420725557 is about 1506.7437920020.

The spelling of 3420725557 in words is "three billion, four hundred twenty million, seven hundred twenty-five thousand, five hundred fifty-seven".