77681027 has 2 divisors, whose sum is σ = 77681028. Its totient is φ = 77681026.

The previous prime is 77681017. The next prime is 77681033. The reversal of 77681027 is 72018677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77681027 - 2⁶ = 77680963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77681017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38840513 + 38840514.

It is an arithmetic number, because the mean of its divisors is an integer number (38840514).

Almost surely, 2^77681027 is an apocalyptic number.

77681027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77681027 is an equidigital number, since it uses as much as digits as its factorization.

77681027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 77681027 is about 8813.6840764802. The cubic root of 77681027 is about 426.6826524637.

The spelling of 77681027 in words is "seventy-seven million, six hundred eighty-one thousand, twenty-seven".