42655913 has 2 divisors, whose sum is σ = 42655914. Its totient is φ = 42655912.

The previous prime is 42655891. The next prime is 42655927. The reversal of 42655913 is 31955624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41886784 + 769129 = 6472^2 + 877^2 .

It is a cyclic number.

It is not a de Polignac number, because 42655913 - 2¹⁴ = 42639529 is a prime.

It is not a weakly prime, because it can be changed into another prime (42655933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21327956 + 21327957.

It is an arithmetic number, because the mean of its divisors is an integer number (21327957).

Almost surely, 2^42655913 is an apocalyptic number.

It is an amenable number.

42655913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42655913 is an equidigital number, since it uses as much as digits as its factorization.

42655913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 42655913 is about 6531.1494394172. The cubic root of 42655913 is about 349.4028265743.

The spelling of 42655913 in words is "forty-two million, six hundred fifty-five thousand, nine hundred thirteen".