261713137 has 8 divisors (see below), whose sum is σ = 299199296. Its totient is φ = 224251632.

The previous prime is 261713131. The next prime is 261713161. The reversal of 261713137 is 731317162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261713137 - 2²⁷ = 127495409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261713099 and 261713108.

It is not an unprimeable number, because it can be changed into a prime (261713131) 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 7 ways as a sum of consecutive naturals, for example, 34438 + ... + 41344.

It is an arithmetic number, because the mean of its divisors is an integer number (37399912).

Almost surely, 2^261713137 is an apocalyptic number.

It is an amenable number.

261713137 is a deficient number, since it is larger than the sum of its proper divisors (37486159).

261713137 is an equidigital number, since it uses as much as digits as its factorization.

261713137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12327.

The product of its digits is 5292, while the sum is 31.

The square root of 261713137 is about 16177.5504017141. The cubic root of 261713137 is about 639.6491705135.

The spelling of 261713137 in words is "two hundred sixty-one million, seven hundred thirteen thousand, one hundred thirty-seven".