76365409 has 4 divisors (see below), whose sum is σ = 76570516. Its totient is φ = 76160304.

The previous prime is 76365407. The next prime is 76365413. The reversal of 76365409 is 90456367.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20070400 + 56295009 = 4480^2 + 7503^2 .

It is a cyclic number.

It is not a de Polignac number, because 76365409 - 2¹ = 76365407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76365407) 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 3 ways as a sum of consecutive naturals, for example, 101994 + ... + 102739.

It is an arithmetic number, because the mean of its divisors is an integer number (19142629).

Almost surely, 2^76365409 is an apocalyptic number.

It is an amenable number.

76365409 is a deficient number, since it is larger than the sum of its proper divisors (205107).

76365409 is a wasteful number, since it uses less digits than its factorization.

76365409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205106.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 76365409 is about 8738.7303997778. The cubic root of 76365409 is about 424.2601365122.

The spelling of 76365409 in words is "seventy-six million, three hundred sixty-five thousand, four hundred nine".