610660109 has 4 divisors (see below), whose sum is σ = 625554300. Its totient is φ = 595765920.

The previous prime is 610660067. The next prime is 610660129. The reversal of 610660109 is 901066016.

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 343991209 + 266668900 = 18547^2 + 16330^2 .

It is a cyclic number.

It is not a de Polignac number, because 610660109 - 2¹⁶ = 610594573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610660129) 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, 7447034 + ... + 7447115.

It is an arithmetic number, because the mean of its divisors is an integer number (156388575).

Almost surely, 2^610660109 is an apocalyptic number.

It is an amenable number.

610660109 is a deficient number, since it is larger than the sum of its proper divisors (14894191).

610660109 is a wasteful number, since it uses less digits than its factorization.

610660109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14894190.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 610660109 is about 24711.5379731817. The cubic root of 610660109 is about 848.3984185454.

The spelling of 610660109 in words is "six hundred ten million, six hundred sixty thousand, one hundred nine".