77530669 has 2 divisors, whose sum is σ = 77530670. Its totient is φ = 77530668.

The previous prime is 77530619. The next prime is 77530681. The reversal of 77530669 is 96603577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64208169 + 13322500 = 8013^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 77530669 - 2⁹ = 77530157 is a prime.

It is a super-2 number, since 2×77530669² = 12022009271175122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77530619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765334 + 38765335.

It is an arithmetic number, because the mean of its divisors is an integer number (38765335).

Almost surely, 2^77530669 is an apocalyptic number.

It is an amenable number.

77530669 is a deficient number, since it is larger than the sum of its proper divisors (1).

77530669 is an equidigital number, since it uses as much as digits as its factorization.

77530669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 77530669 is about 8805.1501406847. The cubic root of 77530669 is about 426.4071815633.

The spelling of 77530669 in words is "seventy-seven million, five hundred thirty thousand, six hundred sixty-nine".