77334121 has 2 divisors, whose sum is σ = 77334122. Its totient is φ = 77334120.

The previous prime is 77334113. The next prime is 77334217. The reversal of 77334121 is 12143377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 7778521 = 8340^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 77334121 - 2³ = 77334113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77334121.

It is not a weakly prime, because it can be changed into another prime (77334721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38667060 + 38667061.

It is an arithmetic number, because the mean of its divisors is an integer number (38667061).

Almost surely, 2^77334121 is an apocalyptic number.

It is an amenable number.

77334121 is a deficient number, since it is larger than the sum of its proper divisors (1).

77334121 is an equidigital number, since it uses as much as digits as its factorization.

77334121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 77334121 is about 8793.9820900432. The cubic root of 77334121 is about 426.0465483605.

Adding to 77334121 its reverse (12143377), we get a palindrome (89477498).

The spelling of 77334121 in words is "seventy-seven million, three hundred thirty-four thousand, one hundred twenty-one".