789121 has 2 divisors, whose sum is σ = 789122. Its totient is φ = 789120.

The previous prime is 789109. The next prime is 789133. The reversal of 789121 is 121987.

It is a balanced prime because it is at equal distance from previous prime (789109) and next prime (789133).

It can be written as a sum of positive squares in only one way, i.e., 705600 + 83521 = 840^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 789121 - 2⁷ = 788993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 789121.

It is not a weakly prime, because it can be changed into another prime (789101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394560 + 394561.

It is an arithmetic number, because the mean of its divisors is an integer number (394561).

2⁷⁸⁹¹²¹ is an apocalyptic number.

It is an amenable number.

789121 is a deficient number, since it is larger than the sum of its proper divisors (1).

789121 is an equidigital number, since it uses as much as digits as its factorization.

789121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 28.

The square root of 789121 is about 888.3248279768. The cubic root of 789121 is about 92.4090559767.

The spelling of 789121 in words is "seven hundred eighty-nine thousand, one hundred twenty-one".