609551 has 4 divisors (see below), whose sum is σ = 630600. Its totient is φ = 588504.

The previous prime is 609541. The next prime is 609571. The reversal of 609551 is 155906.

609551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 609551 - 2⁶ = 609487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 609551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609541) 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, 10481 + ... + 10538.

It is an arithmetic number, because the mean of its divisors is an integer number (157650).

2⁶⁰⁹⁵⁵¹ is an apocalyptic number.

609551 is a deficient number, since it is larger than the sum of its proper divisors (21049).

609551 is a wasteful number, since it uses less digits than its factorization.

609551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21048.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 609551 is about 780.7374718816. The cubic root of 609551 is about 84.7884473849.

The spelling of 609551 in words is "six hundred nine thousand, five hundred fifty-one".