77207730427 has 2 divisors, whose sum is σ = 77207730428. Its totient is φ = 77207730426.

The previous prime is 77207730323. The next prime is 77207730461. The reversal of 77207730427 is 72403770277.

It is a strong prime.

It is an emirp because it is prime and its reverse (72403770277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77207730427 - 2¹¹ = 77207728379 is a prime.

It is a super-2 number, since 2×77207730427² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77207730487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38603865213 + 38603865214.

It is an arithmetic number, because the mean of its divisors is an integer number (38603865214).

Almost surely, 2^77207730427 is an apocalyptic number.

77207730427 is a deficient number, since it is larger than the sum of its proper divisors (1).

77207730427 is an equidigital number, since it uses as much as digits as its factorization.

77207730427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806736, while the sum is 46.

The spelling of 77207730427 in words is "seventy-seven billion, two hundred seven million, seven hundred thirty thousand, four hundred twenty-seven".