609209479 has 2 divisors, whose sum is σ = 609209480. Its totient is φ = 609209478.

The previous prime is 609209437. The next prime is 609209537. The reversal of 609209479 is 974902906.

609209479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609209479 is a prime.

It is a super-2 number, since 2×609209479² = 742272378606902882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609209429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304604739 + 304604740.

It is an arithmetic number, because the mean of its divisors is an integer number (304604740).

Almost surely, 2^609209479 is an apocalyptic number.

609209479 is a deficient number, since it is larger than the sum of its proper divisors (1).

609209479 is an equidigital number, since it uses as much as digits as its factorization.

609209479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 609209479 is about 24682.1692523165. The cubic root of 609209479 is about 847.7260925430.

The spelling of 609209479 in words is "six hundred nine million, two hundred nine thousand, four hundred seventy-nine".