207665113 has 4 divisors (see below), whose sum is σ = 207816868. Its totient is φ = 207513360.

The previous prime is 207665111. The next prime is 207665153. The reversal of 207665113 is 311566702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311566702 = 2 ⋅155783351.

It can be written as a sum of positive squares in 2 ways, for example, as 44515584 + 163149529 = 6672^2 + 12773^2 .

It is a cyclic number.

It is not a de Polignac number, because 207665113 - 2¹ = 207665111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207665111) 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, 73806 + ... + 76567.

It is an arithmetic number, because the mean of its divisors is an integer number (51954217).

Almost surely, 2^207665113 is an apocalyptic number.

It is an amenable number.

207665113 is a deficient number, since it is larger than the sum of its proper divisors (151755).

207665113 is a wasteful number, since it uses less digits than its factorization.

207665113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151754.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 207665113 is about 14410.5903071318. The cubic root of 207665113 is about 592.1810616505.

The spelling of 207665113 in words is "two hundred seven million, six hundred sixty-five thousand, one hundred thirteen".