427798009 has 2 divisors, whose sum is σ = 427798010. Its totient is φ = 427798008.

The previous prime is 427797961. The next prime is 427798039. The reversal of 427798009 is 900897724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401120784 + 26677225 = 20028^2 + 5165^2 .

It is a cyclic number.

It is not a de Polignac number, because 427798009 - 2¹⁵ = 427765241 is a prime.

It is a super-2 number, since 2×427798009² = 366022273008728162, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 427798009.

It is not a weakly prime, because it can be changed into another prime (427798039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213899004 + 213899005.

It is an arithmetic number, because the mean of its divisors is an integer number (213899005).

Almost surely, 2^427798009 is an apocalyptic number.

It is an amenable number.

427798009 is a deficient number, since it is larger than the sum of its proper divisors (1).

427798009 is an equidigital number, since it uses as much as digits as its factorization.

427798009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 427798009 is about 20683.2784877060. The cubic root of 427798009 is about 753.4936320372.

The spelling of 427798009 in words is "four hundred twenty-seven million, seven hundred ninety-eight thousand, nine".