76505513 has 6 divisors (see below), whose sum is σ = 88996266. Its totient is φ = 65576112.

The previous prime is 76505479. The next prime is 76505537. The reversal of 76505513 is 31550567.

It can be written as a sum of positive squares in only one way, i.e., 67190809 + 9314704 = 8197^2 + 3052^2 .

It is not a de Polignac number, because 76505513 - 2⁶ = 76505449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76505513.

It is not an unprimeable number, because it can be changed into a prime (76505563) 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 5 ways as a sum of consecutive naturals, for example, 780620 + ... + 780717.

It is an arithmetic number, because the mean of its divisors is an integer number (14832711).

Almost surely, 2^76505513 is an apocalyptic number.

It is an amenable number.

76505513 is a deficient number, since it is larger than the sum of its proper divisors (12490753).

76505513 is a wasteful number, since it uses less digits than its factorization.

76505513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561351 (or 1561344 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 76505513 is about 8746.7429938235. The cubic root of 76505513 is about 424.5194346641.

The spelling of 76505513 in words is "seventy-six million, five hundred five thousand, five hundred thirteen".