427688945 has 4 divisors (see below), whose sum is σ = 513226740. Its totient is φ = 342151152.

The previous prime is 427688923. The next prime is 427688953. The reversal of 427688945 is 549886724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109851361 + 317837584 = 10481^2 + 17828^2 .

It is a cyclic number.

It is not a de Polignac number, because 427688945 - 2¹² = 427684849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42768890 + ... + 42768899.

It is an arithmetic number, because the mean of its divisors is an integer number (128306685).

Almost surely, 2^427688945 is an apocalyptic number.

It is an amenable number.

427688945 is a deficient number, since it is larger than the sum of its proper divisors (85537795).

427688945 is an equidigital number, since it uses as much as digits as its factorization.

427688945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85537794.

The product of its digits is 3870720, while the sum is 53.

The square root of 427688945 is about 20680.6417937162. The cubic root of 427688945 is about 753.4295940158.

The spelling of 427688945 in words is "four hundred twenty-seven million, six hundred eighty-eight thousand, nine hundred forty-five".