442537913 has 2 divisors, whose sum is σ = 442537914. Its totient is φ = 442537912.

The previous prime is 442537903. The next prime is 442537943. The reversal of 442537913 is 319735244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288082729 + 154455184 = 16973^2 + 12428^2 .

It is a cyclic number.

It is not a de Polignac number, because 442537913 - 2¹⁰ = 442536889 is a prime.

It is not a weakly prime, because it can be changed into another prime (442537903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221268956 + 221268957.

It is an arithmetic number, because the mean of its divisors is an integer number (221268957).

Almost surely, 2^442537913 is an apocalyptic number.

It is an amenable number.

442537913 is a deficient number, since it is larger than the sum of its proper divisors (1).

442537913 is an equidigital number, since it uses as much as digits as its factorization.

442537913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 442537913 is about 21036.5851078544. The cubic root of 442537913 is about 762.0500474611.

The spelling of 442537913 in words is "four hundred forty-two million, five hundred thirty-seven thousand, nine hundred thirteen".