76327309 has 4 divisors (see below), whose sum is σ = 76493340. Its totient is φ = 76161280.

The previous prime is 76327289. The next prime is 76327387. The reversal of 76327309 is 90372367.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90372367 = 53 ⋅1705139.

It can be written as a sum of positive squares in 2 ways, for example, as 11202409 + 65124900 = 3347^2 + 8070^2 .

It is a cyclic number.

It is not a de Polignac number, because 76327309 - 2⁹ = 76326797 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 (76367309) 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, 82324 + ... + 83245.

It is an arithmetic number, because the mean of its divisors is an integer number (19123335).

Almost surely, 2^76327309 is an apocalyptic number.

It is an amenable number.

76327309 is a deficient number, since it is larger than the sum of its proper divisors (166031).

76327309 is a wasteful number, since it uses less digits than its factorization.

76327309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166030.

The product of its (nonzero) digits is 47628, while the sum is 37.

The square root of 76327309 is about 8736.5501772725. The cubic root of 76327309 is about 424.1895679116.

It can be divided in two parts, 76327 and 309, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 76327309 in words is "seventy-six million, three hundred twenty-seven thousand, three hundred nine".