261796871 has 8 divisors (see below), whose sum is σ = 300539904. Its totient is φ = 223389720.

The previous prime is 261796859. The next prime is 261796883. The reversal of 261796871 is 178697162.

It is an interprime number because it is at equal distance from previous prime (261796859) and next prime (261796883).

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 261796871 - 2¹⁸ = 261534727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261796841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82295 + ... + 85416.

It is an arithmetic number, because the mean of its divisors is an integer number (37567488).

Almost surely, 2^261796871 is an apocalyptic number.

261796871 is a deficient number, since it is larger than the sum of its proper divisors (38743033).

261796871 is a wasteful number, since it uses less digits than its factorization.

261796871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167941.

The product of its digits is 254016, while the sum is 47.

The square root of 261796871 is about 16180.1381638106. The cubic root of 261796871 is about 639.7173809126.

The spelling of 261796871 in words is "two hundred sixty-one million, seven hundred ninety-six thousand, eight hundred seventy-one".