76540729 has 4 divisors (see below), whose sum is σ = 77298660. Its totient is φ = 75782800.

The previous prime is 76540703. The next prime is 76540777. The reversal of 76540729 is 92704567.

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 73136704 + 3404025 = 8552^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 76540729 - 2⁵ = 76540697 is a prime.

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 a junction number, because it is equal to n+sod(n) for n = 76540691 and 76540700.

It is not an unprimeable number, because it can be changed into a prime (76540799) 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, 378814 + ... + 379015.

It is an arithmetic number, because the mean of its divisors is an integer number (19324665).

Almost surely, 2^76540729 is an apocalyptic number.

It is an amenable number.

76540729 is a deficient number, since it is larger than the sum of its proper divisors (757931).

76540729 is a wasteful number, since it uses less digits than its factorization.

76540729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757930.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 76540729 is about 8748.7558544058. The cubic root of 76540729 is about 424.5845610520.

The spelling of 76540729 in words is "seventy-six million, five hundred forty thousand, seven hundred twenty-nine".