770228999 has 2 divisors, whose sum is σ = 770229000. Its totient is φ = 770228998.

The previous prime is 770228981. The next prime is 770229023. The reversal of 770228999 is 999822077.

770228999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (999822077) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-770228999 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 770228999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (770228939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385114499 + 385114500.

It is an arithmetic number, because the mean of its divisors is an integer number (385114500).

Almost surely, 2^770228999 is an apocalyptic number.

770228999 is a deficient number, since it is larger than the sum of its proper divisors (1).

770228999 is an equidigital number, since it uses as much as digits as its factorization.

770228999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 770228999 is about 27752.9998198393. Note that the first 3 decimals coincide. The cubic root of 770228999 is about 916.6564990314.

The spelling of 770228999 in words is "seven hundred seventy million, two hundred twenty-eight thousand, nine hundred ninety-nine".