874789121 has 2 divisors, whose sum is σ = 874789122. Its totient is φ = 874789120.

The previous prime is 874789117. The next prime is 874789141. The reversal of 874789121 is 121987478.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748788496 + 126000625 = 27364^2 + 11225^2 .

It is a cyclic number.

It is not a de Polignac number, because 874789121 - 2² = 874789117 is a prime.

It is not a weakly prime, because it can be changed into another prime (874789141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437394560 + 437394561.

It is an arithmetic number, because the mean of its divisors is an integer number (437394561).

Almost surely, 2^874789121 is an apocalyptic number.

It is an amenable number.

874789121 is a deficient number, since it is larger than the sum of its proper divisors (1).

874789121 is an equidigital number, since it uses as much as digits as its factorization.

874789121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 47.

The square root of 874789121 is about 29576.8341950250. The cubic root of 874789121 is about 956.3887476860.

The spelling of 874789121 in words is "eight hundred seventy-four million, seven hundred eighty-nine thousand, one hundred twenty-one".