427455709 has 8 divisors (see below), whose sum is σ = 449717688. Its totient is φ = 405757440.

The previous prime is 427455703. The next prime is 427455773. The reversal of 427455709 is 907554724.

It can be written as a sum of positive squares in 4 ways, for example, as 155700484 + 271755225 = 12478^2 + 16485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427455709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427455703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139372 + ... + 142405.

It is an arithmetic number, because the mean of its divisors is an integer number (56214711).

Almost surely, 2^427455709 is an apocalyptic number.

It is an amenable number.

427455709 is a deficient number, since it is larger than the sum of its proper divisors (22261979).

427455709 is a wasteful number, since it uses less digits than its factorization.

427455709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281855.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 427455709 is about 20675.0020314388. The cubic root of 427455709 is about 753.2926106153.

The spelling of 427455709 in words is "four hundred twenty-seven million, four hundred fifty-five thousand, seven hundred nine".