77327641 has 2 divisors, whose sum is σ = 77327642. Its totient is φ = 77327640.

The previous prime is 77327639. The next prime is 77327651. The reversal of 77327641 is 14672377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 4822416 = 8515^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 77327641 - 2¹ = 77327639 is a prime.

Together with 77327639, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77327641.

It is not a weakly prime, because it can be changed into another prime (77327651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38663820 + 38663821.

It is an arithmetic number, because the mean of its divisors is an integer number (38663821).

Almost surely, 2^77327641 is an apocalyptic number.

It is an amenable number.

77327641 is a deficient number, since it is larger than the sum of its proper divisors (1).

77327641 is an equidigital number, since it uses as much as digits as its factorization.

77327641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 37.

The square root of 77327641 is about 8793.6136485520. The cubic root of 77327641 is about 426.0346482285.

The spelling of 77327641 in words is "seventy-seven million, three hundred twenty-seven thousand, six hundred forty-one".