76316809 has 4 divisors (see below), whose sum is σ = 76874004. Its totient is φ = 75759616.

The previous prime is 76316797. The next prime is 76316827. The reversal of 76316809 is 90861367.

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 15523600 + 60793209 = 3940^2 + 7797^2 .

It is a 6-Lehmer number, since φ(76316809) divides (76316809-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 76316809 - 2¹⁵ = 76284041 is a prime.

It is a super-3 number, since 3×76316809³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76316869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278392 + ... + 278665.

It is an arithmetic number, because the mean of its divisors is an integer number (19218501).

Almost surely, 2^76316809 is an apocalyptic number.

It is an amenable number.

76316809 is a deficient number, since it is larger than the sum of its proper divisors (557195).

76316809 is a wasteful number, since it uses less digits than its factorization.

76316809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557194.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 76316809 is about 8735.9492329111. The cubic root of 76316809 is about 424.1701157444.

The spelling of 76316809 in words is "seventy-six million, three hundred sixteen thousand, eight hundred nine".