77081443 has 2 divisors, whose sum is σ = 77081444. Its totient is φ = 77081442.

The previous prime is 77081401. The next prime is 77081467. The reversal of 77081443 is 34418077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77081443 - 2¹³ = 77073251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77081399 and 77081408.

It is not a weakly prime, because it can be changed into another prime (77081243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38540721 + 38540722.

It is an arithmetic number, because the mean of its divisors is an integer number (38540722).

Almost surely, 2^77081443 is an apocalyptic number.

77081443 is a deficient number, since it is larger than the sum of its proper divisors (1).

77081443 is an equidigital number, since it uses as much as digits as its factorization.

77081443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 77081443 is about 8779.6038065507. The cubic root of 77081443 is about 425.5820270166.

The spelling of 77081443 in words is "seventy-seven million, eighty-one thousand, four hundred forty-three".