204126077 has 8 divisors (see below), whose sum is σ = 210432600. Its totient is φ = 197861184.

The previous prime is 204126067. The next prime is 204126079. The reversal of 204126077 is 770621402.

It can be written as a sum of positive squares in 4 ways, for example, as 7958041 + 196168036 = 2821^2 + 14006^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 204126077 - 2⁴ = 204126061 is a prime.

It is a super-2 number, since 2×204126077² = 83334910622819858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204126079) 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 7 ways as a sum of consecutive naturals, for example, 302 + ... + 20207.

It is an arithmetic number, because the mean of its divisors is an integer number (26304075).

Almost surely, 2^204126077 is an apocalyptic number.

It is an amenable number.

204126077 is a deficient number, since it is larger than the sum of its proper divisors (6306523).

204126077 is a wasteful number, since it uses less digits than its factorization.

204126077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20815.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 204126077 is about 14287.2697531754. The cubic root of 204126077 is about 588.7977788888.

Adding to 204126077 its reverse (770621402), we get a palindrome (974747479).

The spelling of 204126077 in words is "two hundred four million, one hundred twenty-six thousand, seventy-seven".