427660309 has 2 divisors, whose sum is σ = 427660310. Its totient is φ = 427660308.

The previous prime is 427660297. The next prime is 427660349. The reversal of 427660309 is 903066724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322023025 + 105637284 = 17945^2 + 10278^2 .

It is a cyclic number.

It is not a de Polignac number, because 427660309 - 2⁹ = 427659797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427660349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213830154 + 213830155.

It is an arithmetic number, because the mean of its divisors is an integer number (213830155).

Almost surely, 2^427660309 is an apocalyptic number.

It is an amenable number.

427660309 is a deficient number, since it is larger than the sum of its proper divisors (1).

427660309 is an equidigital number, since it uses as much as digits as its factorization.

427660309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 427660309 is about 20679.9494438454. The cubic root of 427660309 is about 753.4127782968.

The spelling of 427660309 in words is "four hundred twenty-seven million, six hundred sixty thousand, three hundred nine".