77094389 has 2 divisors, whose sum is σ = 77094390. Its totient is φ = 77094388.

The previous prime is 77094377. The next prime is 77094397. The reversal of 77094389 is 98349077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 38031889 = 6250^2 + 6167^2 .

It is an emirp because it is prime and its reverse (98349077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77094389 - 2⁴ = 77094373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77094349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38547194 + 38547195.

It is an arithmetic number, because the mean of its divisors is an integer number (38547195).

Almost surely, 2^77094389 is an apocalyptic number.

It is an amenable number.

77094389 is a deficient number, since it is larger than the sum of its proper divisors (1).

77094389 is an equidigital number, since it uses as much as digits as its factorization.

77094389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 77094389 is about 8780.3410526015. The cubic root of 77094389 is about 425.6058514993.

It can be divided in two parts, 770 and 94389, that added together give a palindrome (95159).

The spelling of 77094389 in words is "seventy-seven million, ninety-four thousand, three hundred eighty-nine".