76545009 has 6 divisors (see below), whose sum is σ = 110565026. Its totient is φ = 51030000.

The previous prime is 76544987. The next prime is 76545013. The reversal of 76545009 is 90054567.

It can be written as a sum of positive squares in only one way, i.e., 56295009 + 20250000 = 7503^2 + 4500^2 .

It is not a de Polignac number, because 76545009 - 2⁹ = 76544497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76545109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4252492 + ... + 4252509.

Almost surely, 2^76545009 is an apocalyptic number.

It is an amenable number.

76545009 is a deficient number, since it is larger than the sum of its proper divisors (34020017).

76545009 is a wasteful number, since it uses less digits than its factorization.

76545009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505007 (or 8505004 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 76545009 is about 8749.0004571951. Note that the first 3 decimals coincide. The cubic root of 76545009 is about 424.5924748694.

The spelling of 76545009 in words is "seventy-six million, five hundred forty-five thousand, nine".