427000909 has 2 divisors, whose sum is σ = 427000910. Its totient is φ = 427000908.

The previous prime is 427000859. The next prime is 427000933. The reversal of 427000909 is 909000724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395134884 + 31866025 = 19878^2 + 5645^2 .

It is a cyclic number.

It is not a de Polignac number, because 427000909 - 2¹³ = 426992717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427000939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213500454 + 213500455.

It is an arithmetic number, because the mean of its divisors is an integer number (213500455).

Almost surely, 2^427000909 is an apocalyptic number.

It is an amenable number.

427000909 is a deficient number, since it is larger than the sum of its proper divisors (1).

427000909 is an equidigital number, since it uses as much as digits as its factorization.

427000909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 427000909 is about 20664.0003145567. Note that the first 3 decimals coincide. The cubic root of 427000909 is about 753.0253555926.

The spelling of 427000909 in words is "four hundred twenty-seven million, nine hundred nine", and thus it is an aban number.