612361609 has 4 divisors (see below), whose sum is σ = 627297300. Its totient is φ = 597425920.

The previous prime is 612361597. The next prime is 612361681. The reversal of 612361609 is 906163216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144072009 + 468289600 = 12003^2 + 21640^2 .

It is a cyclic number.

It is not a de Polignac number, because 612361609 - 2¹⁵ = 612328841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612371609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7467784 + ... + 7467865.

It is an arithmetic number, because the mean of its divisors is an integer number (156824325).

Almost surely, 2^612361609 is an apocalyptic number.

It is an amenable number.

612361609 is a deficient number, since it is larger than the sum of its proper divisors (14935691).

612361609 is a wasteful number, since it uses less digits than its factorization.

612361609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14935690.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 612361609 is about 24745.9412631648. The cubic root of 612361609 is about 849.1856602119.

The spelling of 612361609 in words is "six hundred twelve million, three hundred sixty-one thousand, six hundred nine".