78095513 has 4 divisors (see below), whose sum is σ = 78116148. Its totient is φ = 78074880.

The previous prime is 78095509. The next prime is 78095533. The reversal of 78095513 is 31559087.

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 60016009 + 18079504 = 7747^2 + 4252^2 .

It is a cyclic number.

It is not a de Polignac number, because 78095513 - 2² = 78095509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78095503) 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 3 ways as a sum of consecutive naturals, for example, 2828 + ... + 12813.

It is an arithmetic number, because the mean of its divisors is an integer number (19529037).

Almost surely, 2^78095513 is an apocalyptic number.

It is an amenable number.

78095513 is a deficient number, since it is larger than the sum of its proper divisors (20635).

78095513 is a wasteful number, since it uses less digits than its factorization.

78095513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20634.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 78095513 is about 8837.1665707963. The cubic root of 78095513 is about 427.4401963697.

The spelling of 78095513 in words is "seventy-eight million, ninety-five thousand, five hundred thirteen".