204487137 has 6 divisors (see below), whose sum is σ = 295370322. Its totient is φ = 136324752.

The previous prime is 204487133. The next prime is 204487141. The reversal of 204487137 is 731784402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204487133) and next prime (204487141).

It can be written as a sum of positive squares in only one way, i.e., 152992161 + 51494976 = 12369^2 + 7176^2 .

It is not a de Polignac number, because 204487137 - 2² = 204487133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204487133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11360388 + ... + 11360405.

It is an arithmetic number, because the mean of its divisors is an integer number (49228387).

Almost surely, 2^204487137 is an apocalyptic number.

It is an amenable number.

204487137 is a deficient number, since it is larger than the sum of its proper divisors (90883185).

204487137 is a wasteful number, since it uses less digits than its factorization.

204487137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22720799 (or 22720796 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 204487137 is about 14299.8998947545. The cubic root of 204487137 is about 589.1447313013.

The spelling of 204487137 in words is "two hundred four million, four hundred eighty-seven thousand, one hundred thirty-seven".