609443965 has 32 divisors (see below), whose sum is σ = 843423840. Its totient is φ = 418750464.

The previous prime is 609443953. The next prime is 609443977. The reversal of 609443965 is 569344906.

It is an interprime number because it is at equal distance from previous prime (609443953) and next prime (609443977).

It can be written as a sum of positive squares in 16 ways, for example, as 271656324 + 337787641 = 16482^2 + 18379^2 .

It is a cyclic number.

It is not a de Polignac number, because 609443965 - 2⁷ = 609443837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95247 + ... + 101443.

It is an arithmetic number, because the mean of its divisors is an integer number (26356995).

Almost surely, 2^609443965 is an apocalyptic number.

609443965 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

609443965 is a deficient number, since it is larger than the sum of its proper divisors (233979875).

609443965 is a wasteful number, since it uses less digits than its factorization.

609443965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 609443965 is about 24686.9189045535. The cubic root of 609443965 is about 847.8348424390.

The spelling of 609443965 in words is "six hundred nine million, four hundred forty-three thousand, nine hundred sixty-five".