609450409 has 2 divisors, whose sum is σ = 609450410. Its totient is φ = 609450408.

The previous prime is 609450407. The next prime is 609450437. The reversal of 609450409 is 904054906.

609450409 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 can be written as a sum of positive squares in only one way, i.e., 468506025 + 140944384 = 21645^2 + 11872^2 .

It is a cyclic number.

It is not a de Polignac number, because 609450409 - 2¹ = 609450407 is a prime.

Together with 609450407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (609450407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304725204 + 304725205.

It is an arithmetic number, because the mean of its divisors is an integer number (304725205).

Almost surely, 2^609450409 is an apocalyptic number.

It is an amenable number.

609450409 is a deficient number, since it is larger than the sum of its proper divisors (1).

609450409 is an equidigital number, since it uses as much as digits as its factorization.

609450409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 609450409 is about 24687.0494186729. The cubic root of 609450409 is about 847.8378306429.

The spelling of 609450409 in words is "six hundred nine million, four hundred fifty thousand, four hundred nine".