77901073 has 2 divisors, whose sum is σ = 77901074. Its totient is φ = 77901072.

The previous prime is 77901071. The next prime is 77901097. The reversal of 77901073 is 37010977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43467649 + 34433424 = 6593^2 + 5868^2 .

It is an emirp because it is prime and its reverse (37010977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77901073 - 2¹ = 77901071 is a prime.

Together with 77901071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77901071) 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, 38950536 + 38950537.

It is an arithmetic number, because the mean of its divisors is an integer number (38950537).

Almost surely, 2^77901073 is an apocalyptic number.

It is an amenable number.

77901073 is a deficient number, since it is larger than the sum of its proper divisors (1).

77901073 is an equidigital number, since it uses as much as digits as its factorization.

77901073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 77901073 is about 8826.1584508777. The cubic root of 77901073 is about 427.0851587141.

The spelling of 77901073 in words is "seventy-seven million, nine hundred one thousand, seventy-three".