427047989 has 2 divisors, whose sum is σ = 427047990. Its totient is φ = 427047988.

The previous prime is 427047979. The next prime is 427048019. The reversal of 427047989 is 989740724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406707889 + 20340100 = 20167^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 427047989 - 2¹⁶ = 426982453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427047919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213523994 + 213523995.

It is an arithmetic number, because the mean of its divisors is an integer number (213523995).

Almost surely, 2^427047989 is an apocalyptic number.

It is an amenable number.

427047989 is a deficient number, since it is larger than the sum of its proper divisors (1).

427047989 is an equidigital number, since it uses as much as digits as its factorization.

427047989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 427047989 is about 20665.1394623893. The cubic root of 427047989 is about 753.0530301089.

The spelling of 427047989 in words is "four hundred twenty-seven million, forty-seven thousand, nine hundred eighty-nine".