261117703 has 16 divisors (see below), whose sum is σ = 342685440. Its totient is φ = 192758400.

The previous prime is 261117683. The next prime is 261117713. The reversal of 261117703 is 307711162.

261117703 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261117703 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 (261117713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87778 + ... + 90703.

It is an arithmetic number, because the mean of its divisors is an integer number (21417840).

Almost surely, 2^261117703 is an apocalyptic number.

261117703 is a deficient number, since it is larger than the sum of its proper divisors (81567737).

261117703 is a wasteful number, since it uses less digits than its factorization.

261117703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178518.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 261117703 is about 16159.1368271947. The cubic root of 261117703 is about 639.1637050436.

Adding to 261117703 its reverse (307711162), we get a palindrome (568828865).

The spelling of 261117703 in words is "two hundred sixty-one million, one hundred seventeen thousand, seven hundred three".