76009729 has 4 divisors (see below), whose sum is σ = 78064084. Its totient is φ = 73955376.

The previous prime is 76009711. The next prime is 76009741. The reversal of 76009729 is 92790067.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92790067 = 59 ⋅1572713.

It can be written as a sum of positive squares in 2 ways, for example, as 56851600 + 19158129 = 7540^2 + 4377^2 .

It is a cyclic number.

It is not a de Polignac number, because 76009729 - 2¹⁷ = 75878657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76009691 and 76009700.

It is not an unprimeable number, because it can be changed into a prime (76009429) 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, 1027122 + ... + 1027195.

It is an arithmetic number, because the mean of its divisors is an integer number (19516021).

Almost surely, 2^76009729 is an apocalyptic number.

It is an amenable number.

76009729 is a deficient number, since it is larger than the sum of its proper divisors (2054355).

76009729 is a wasteful number, since it uses less digits than its factorization.

76009729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054354.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 76009729 is about 8718.3558656435. The cubic root of 76009729 is about 423.6004323594.

The spelling of 76009729 in words is "seventy-six million, nine thousand, seven hundred twenty-nine".