77828027 has 2 divisors, whose sum is σ = 77828028. Its totient is φ = 77828026.

The previous prime is 77827951. The next prime is 77828033. The reversal of 77828027 is 72082877.

It is a strong prime.

It is an emirp because it is prime and its reverse (72082877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77828027 - 2¹² = 77823931 is a prime.

It is not a weakly prime, because it can be changed into another prime (77828087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38914013 + 38914014.

It is an arithmetic number, because the mean of its divisors is an integer number (38914014).

Almost surely, 2^77828027 is an apocalyptic number.

77828027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77828027 is an equidigital number, since it uses as much as digits as its factorization.

77828027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 77828027 is about 8822.0194400149. The cubic root of 77828027 is about 426.9516277402.

The spelling of 77828027 in words is "seventy-seven million, eight hundred twenty-eight thousand, twenty-seven".