427221607 has 4 divisors (see below), whose sum is σ = 427644360. Its totient is φ = 426798856.

The previous prime is 427221601. The next prime is 427221653. The reversal of 427221607 is 706122724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427221607 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427221601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209857 + ... + 211882.

It is an arithmetic number, because the mean of its divisors is an integer number (106911090).

Almost surely, 2^427221607 is an apocalyptic number.

427221607 is a deficient number, since it is larger than the sum of its proper divisors (422753).

427221607 is a wasteful number, since it uses less digits than its factorization.

427221607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422752.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 427221607 is about 20669.3397814250. The cubic root of 427221607 is about 753.1550684826.

The spelling of 427221607 in words is "four hundred twenty-seven million, two hundred twenty-one thousand, six hundred seven".