609729641 has 4 divisors (see below), whose sum is σ = 610386900. Its totient is φ = 609072384.

The previous prime is 609729629. The next prime is 609729647. The reversal of 609729641 is 146927906.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43099225 + 566630416 = 6565^2 + 23804^2 .

It is a cyclic number.

It is not a de Polignac number, because 609729641 - 2¹⁸ = 609467497 is a prime.

It is a super-2 number, since 2×609729641² = 743540470227977762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609729592 and 609729601.

It is not an unprimeable number, because it can be changed into a prime (609729647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327236 + ... + 329093.

It is an arithmetic number, because the mean of its divisors is an integer number (152596725).

Almost surely, 2^609729641 is an apocalyptic number.

It is an amenable number.

609729641 is a deficient number, since it is larger than the sum of its proper divisors (657259).

609729641 is an equidigital number, since it uses as much as digits as its factorization.

609729641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657258.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 609729641 is about 24692.7042058986. The cubic root of 609729641 is about 847.9672955414.

The spelling of 609729641 in words is "six hundred nine million, seven hundred twenty-nine thousand, six hundred forty-one".