121786873 has 4 divisors (see below), whose sum is σ = 131155108. Its totient is φ = 112418640.

The previous prime is 121786871. The next prime is 121786897. The reversal of 121786873 is 378687121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12730624 + 109056249 = 3568^2 + 10443^2 .

It is a cyclic number.

It is not a de Polignac number, because 121786873 - 2¹ = 121786871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121786871) 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, 4684098 + ... + 4684123.

It is an arithmetic number, because the mean of its divisors is an integer number (32788777).

Almost surely, 2^121786873 is an apocalyptic number.

121786873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121786873 is a deficient number, since it is larger than the sum of its proper divisors (9368235).

121786873 is an equidigital number, since it uses as much as digits as its factorization.

121786873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368234.

The product of its digits is 112896, while the sum is 43.

The square root of 121786873 is about 11035.7089939886. The cubic root of 121786873 is about 495.6785890828.

The spelling of 121786873 in words is "one hundred twenty-one million, seven hundred eighty-six thousand, eight hundred seventy-three".