204401377 has 2 divisors, whose sum is σ = 204401378. Its totient is φ = 204401376.

The previous prime is 204401363. The next prime is 204401381. The reversal of 204401377 is 773104402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151388416 + 53012961 = 12304^2 + 7281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204401377 is a prime.

It is a super-2 number, since 2×204401377² = 83559845838992258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204404377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102200688 + 102200689.

It is an arithmetic number, because the mean of its divisors is an integer number (102200689).

Almost surely, 2^204401377 is an apocalyptic number.

It is an amenable number.

204401377 is a deficient number, since it is larger than the sum of its proper divisors (1).

204401377 is an equidigital number, since it uses as much as digits as its factorization.

204401377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 204401377 is about 14296.9009578999. The cubic root of 204401377 is about 589.0623591812.

Adding to 204401377 its reverse (773104402), we get a palindrome (977505779).

The spelling of 204401377 in words is "two hundred four million, four hundred one thousand, three hundred seventy-seven".