609657281 has 16 divisors (see below), whose sum is σ = 651772800. Its totient is φ = 568270080.

The previous prime is 609657263. The next prime is 609657289. The reversal of 609657281 is 182756906.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609657281 is a prime.

It is a super-2 number, since 2×609657281² = 743364000552625922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609657289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251620 + ... + 1252106.

It is an arithmetic number, because the mean of its divisors is an integer number (40735800).

Almost surely, 2^609657281 is an apocalyptic number.

It is an amenable number.

609657281 is a deficient number, since it is larger than the sum of its proper divisors (42115519).

609657281 is a wasteful number, since it uses less digits than its factorization.

609657281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 609657281 is about 24691.2389523086. The cubic root of 609657281 is about 847.9337498862.

The spelling of 609657281 in words is "six hundred nine million, six hundred fifty-seven thousand, two hundred eighty-one".