442261387 has 2 divisors, whose sum is σ = 442261388. Its totient is φ = 442261386.

The previous prime is 442261361. The next prime is 442261429. The reversal of 442261387 is 783162244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442261387 - 2²³ = 433872779 is a prime.

It is not a weakly prime, because it can be changed into another prime (442261327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221130693 + 221130694.

It is an arithmetic number, because the mean of its divisors is an integer number (221130694).

Almost surely, 2^442261387 is an apocalyptic number.

442261387 is a deficient number, since it is larger than the sum of its proper divisors (1).

442261387 is an equidigital number, since it uses as much as digits as its factorization.

442261387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 442261387 is about 21030.0115786939. The cubic root of 442261387 is about 761.8912885147.

The spelling of 442261387 in words is "four hundred forty-two million, two hundred sixty-one thousand, three hundred eighty-seven".