77081071 has 2 divisors, whose sum is σ = 77081072. Its totient is φ = 77081070.

The previous prime is 77081057. The next prime is 77081083. The reversal of 77081071 is 17018077.

It is a strong prime.

It is an emirp because it is prime and its reverse (17018077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77081071 - 2⁹ = 77080559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77081051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38540535 + 38540536.

It is an arithmetic number, because the mean of its divisors is an integer number (38540536).

Almost surely, 2^77081071 is an apocalyptic number.

77081071 is a deficient number, since it is larger than the sum of its proper divisors (1).

77081071 is an equidigital number, since it uses as much as digits as its factorization.

77081071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744, while the sum is 31.

The square root of 77081071 is about 8779.5826210589. The cubic root of 77081071 is about 425.5813423868.

The spelling of 77081071 in words is "seventy-seven million, eighty-one thousand, seventy-one".