101720873 has 4 divisors (see below), whose sum is σ = 101756160. Its totient is φ = 101685588.

The previous prime is 101720863. The next prime is 101720887. The reversal of 101720873 is 378027101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 378027101 = 59 ⋅6407239.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101720873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101720803) 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, 12893 + ... + 19226.

It is an arithmetic number, because the mean of its divisors is an integer number (25439040).

Almost surely, 2^101720873 is an apocalyptic number.

It is an amenable number.

101720873 is a deficient number, since it is larger than the sum of its proper divisors (35287).

101720873 is an equidigital number, since it uses as much as digits as its factorization.

101720873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35286.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 101720873 is about 10085.6766257897. The cubic root of 101720873 is about 466.8062831123.

Adding to 101720873 its reverse (378027101), we get a palindrome (479747974).

The spelling of 101720873 in words is "one hundred one million, seven hundred twenty thousand, eight hundred seventy-three".