102791 has 4 divisors (see below), whose sum is σ = 110712. Its totient is φ = 94872.

The previous prime is 102769. The next prime is 102793. The reversal of 102791 is 197201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102791.

It is not an unprimeable number, because it can be changed into a prime (102793) 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, 3941 + ... + 3966.

It is an arithmetic number, because the mean of its divisors is an integer number (27678).

2¹⁰²⁷⁹¹ is an apocalyptic number.

102791 is a deficient number, since it is larger than the sum of its proper divisors (7921).

102791 is an equidigital number, since it uses as much as digits as its factorization.

102791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 102791 is about 320.6103554160. The cubic root of 102791 is about 46.8437545848.

Adding to 102791 its reverse (197201), we get a palindrome (299992).

The spelling of 102791 in words is "one hundred two thousand, seven hundred ninety-one".