609479729 has 2 divisors, whose sum is σ = 609479730. Its totient is φ = 609479728.

The previous prime is 609479711. The next prime is 609479749. The reversal of 609479729 is 927974906.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397922704 + 211557025 = 19948^2 + 14545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609479729 is a prime.

It is not a weakly prime, because it can be changed into another prime (609479749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304739864 + 304739865.

It is an arithmetic number, because the mean of its divisors is an integer number (304739865).

Almost surely, 2^609479729 is an apocalyptic number.

It is an amenable number.

609479729 is a deficient number, since it is larger than the sum of its proper divisors (1).

609479729 is an equidigital number, since it uses as much as digits as its factorization.

609479729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The square root of 609479729 is about 24687.6432451540. The cubic root of 609479729 is about 847.8514266119.

The spelling of 609479729 in words is "six hundred nine million, four hundred seventy-nine thousand, seven hundred twenty-nine".