77086109 has 8 divisors (see below), whose sum is σ = 83612088. Its totient is φ = 70781440.

The previous prime is 77086099. The next prime is 77086111. The reversal of 77086109 is 90168077.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9796900 + 67289209 = 3130^2 + 8203^2 .

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 77086109 - 2¹² = 77082013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77086159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54602 + ... + 55995.

It is an arithmetic number, because the mean of its divisors is an integer number (10451511).

Almost surely, 2^77086109 is an apocalyptic number.

It is an amenable number.

77086109 is a deficient number, since it is larger than the sum of its proper divisors (6525979).

77086109 is a wasteful number, since it uses less digits than its factorization.

77086109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110655.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 77086109 is about 8779.8695320603. The cubic root of 77086109 is about 425.5906141490.

The spelling of 77086109 in words is "seventy-seven million, eighty-six thousand, one hundred nine".