77616841 has 2 divisors, whose sum is σ = 77616842. Its totient is φ = 77616840.

The previous prime is 77616809. The next prime is 77616853. The reversal of 77616841 is 14861677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 33593616 = 6635^2 + 5796^2 .

It is a cyclic number.

It is not a de Polignac number, because 77616841 - 2⁵ = 77616809 is a prime.

It is a super-3 number, since 3×77616841³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77616794 and 77616803.

It is not a weakly prime, because it can be changed into another prime (77616871) 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, 38808420 + 38808421.

It is an arithmetic number, because the mean of its divisors is an integer number (38808421).

Almost surely, 2^77616841 is an apocalyptic number.

It is an amenable number.

77616841 is a deficient number, since it is larger than the sum of its proper divisors (1).

77616841 is an equidigital number, since it uses as much as digits as its factorization.

77616841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 77616841 is about 8810.0420543832. The cubic root of 77616841 is about 426.5651008111.

The spelling of 77616841 in words is "seventy-seven million, six hundred sixteen thousand, eight hundred forty-one".