120797777 has 2 divisors, whose sum is σ = 120797778. Its totient is φ = 120797776.

The previous prime is 120797773. The next prime is 120797779. The reversal of 120797777 is 777797021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 54228496 = 8159^2 + 7364^2 .

It is an emirp because it is prime and its reverse (777797021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120797777 - 2² = 120797773 is a prime.

It is a super-4 number, since 4×120797777⁴ (a number of 33 digits) contains 4444 as substring.

Together with 120797779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120797773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60398888 + 60398889.

It is an arithmetic number, because the mean of its divisors is an integer number (60398889).

Almost surely, 2^120797777 is an apocalyptic number.

It is an amenable number.

120797777 is a deficient number, since it is larger than the sum of its proper divisors (1).

120797777 is an equidigital number, since it uses as much as digits as its factorization.

120797777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302526, while the sum is 47.

The square root of 120797777 is about 10990.8042016952. The cubic root of 120797777 is about 494.3330500093. Note that the first 3 decimals are identical.

The spelling of 120797777 in words is "one hundred twenty million, seven hundred ninety-seven thousand, seven hundred seventy-seven".