427188061 has 4 divisors (see below), whose sum is σ = 437607324. Its totient is φ = 416768800.

The previous prime is 427188059. The next prime is 427188079. The reversal of 427188061 is 160881724.

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 9803161 + 417384900 = 3131^2 + 20430^2 .

It is a cyclic number.

It is not a de Polignac number, because 427188061 - 2¹ = 427188059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427188061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427188011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5209570 + ... + 5209651.

It is an arithmetic number, because the mean of its divisors is an integer number (109401831).

Almost surely, 2^427188061 is an apocalyptic number.

427188061 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

427188061 is a deficient number, since it is larger than the sum of its proper divisors (10419263).

427188061 is a wasteful number, since it uses less digits than its factorization.

427188061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10419262.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 427188061 is about 20668.5282736822. The cubic root of 427188061 is about 753.1353550593.

The spelling of 427188061 in words is "four hundred twenty-seven million, one hundred eighty-eight thousand, sixty-one".