77885329 has 8 divisors (see below), whose sum is σ = 80985960. Its totient is φ = 74812416.

The previous prime is 77885323. The next prime is 77885371. The reversal of 77885329 is 92358877.

It can be written as a sum of positive squares in 4 ways, for example, as 42601729 + 35283600 = 6527^2 + 5940^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77885329 - 2³ = 77885321 is a prime.

It is a super-2 number, since 2×77885329² = 12132248946876482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77885321) 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 in 7 ways as a sum of consecutive naturals, for example, 1104 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (10123245).

Almost surely, 2^77885329 is an apocalyptic number.

It is an amenable number.

77885329 is a deficient number, since it is larger than the sum of its proper divisors (3100631).

77885329 is a wasteful number, since it uses less digits than its factorization.

77885329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13859.

The product of its digits is 846720, while the sum is 49.

The square root of 77885329 is about 8825.2665115565. The cubic root of 77885329 is about 427.0563851191.

The spelling of 77885329 in words is "seventy-seven million, eight hundred eighty-five thousand, three hundred twenty-nine".