609681331 has 16 divisors (see below), whose sum is σ = 709890048. Its totient is φ = 512820000.

The previous prime is 609681299. The next prime is 609681341. The reversal of 609681331 is 133186906.

It is not a de Polignac number, because 609681331 - 2⁵ = 609681299 is a prime.

It is a super-2 number, since 2×609681331² = 743422650739863122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (609681341) 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 15 ways as a sum of consecutive naturals, for example, 108081 + ... + 113581.

It is an arithmetic number, because the mean of its divisors is an integer number (44368128).

Almost surely, 2^609681331 is an apocalyptic number.

609681331 is a deficient number, since it is larger than the sum of its proper divisors (100208717).

609681331 is a wasteful number, since it uses less digits than its factorization.

609681331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5802.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 609681331 is about 24691.7259623543. The cubic root of 609681331 is about 847.9448996142.

The spelling of 609681331 in words is "six hundred nine million, six hundred eighty-one thousand, three hundred thirty-one".