77052009 has 8 divisors (see below), whose sum is σ = 103475680. Its totient is φ = 50998176.

The previous prime is 77051999. The next prime is 77052029. The reversal of 77052009 is 90025077.

It is a happy number.

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

It is not a de Polignac number, because 77052009 - 2⁵ = 77051977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77052029) 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, 91972 + ... + 92805.

It is an arithmetic number, because the mean of its divisors is an integer number (12934460).

Almost surely, 2^77052009 is an apocalyptic number.

It is an amenable number.

77052009 is a deficient number, since it is larger than the sum of its proper divisors (26423671).

77052009 is a wasteful number, since it uses less digits than its factorization.

77052009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184919.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 77052009 is about 8777.9273749559. The cubic root of 77052009 is about 425.5278497911.

The spelling of 77052009 in words is "seventy-seven million, fifty-two thousand, nine".