77081827 has 2 divisors, whose sum is σ = 77081828. Its totient is φ = 77081826.

The previous prime is 77081821. The next prime is 77081831. The reversal of 77081827 is 72818077.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77081827 - 2⁷ = 77081699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77081827.

It is not a weakly prime, because it can be changed into another prime (77081821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38540913 + 38540914.

It is an arithmetic number, because the mean of its divisors is an integer number (38540914).

Almost surely, 2^77081827 is an apocalyptic number.

77081827 is a deficient number, since it is larger than the sum of its proper divisors (1).

77081827 is an equidigital number, since it uses as much as digits as its factorization.

77081827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 77081827 is about 8779.6256753919. The cubic root of 77081827 is about 425.5827337290.

The spelling of 77081827 in words is "seventy-seven million, eighty-one thousand, eight hundred twenty-seven".