77026121 has 2 divisors, whose sum is σ = 77026122. Its totient is φ = 77026120.

The previous prime is 77026109. The next prime is 77026123. The reversal of 77026121 is 12162077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 37650496 = 6275^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 77026121 - 2¹⁰ = 77025097 is a prime.

It is a Sophie Germain prime.

Together with 77026123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (77026123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38513060 + 38513061.

It is an arithmetic number, because the mean of its divisors is an integer number (38513061).

Almost surely, 2^77026121 is an apocalyptic number.

It is an amenable number.

77026121 is a deficient number, since it is larger than the sum of its proper divisors (1).

77026121 is an equidigital number, since it uses as much as digits as its factorization.

77026121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 77026121 is about 8776.4526432950. The cubic root of 77026121 is about 425.4801880490.

Adding to 77026121 its reverse (12162077), we get a palindrome (89188198).

The spelling of 77026121 in words is "seventy-seven million, twenty-six thousand, one hundred twenty-one".