78296513 has 8 divisors (see below), whose sum is σ = 79546536. Its totient is φ = 77056000.

The previous prime is 78296503. The next prime is 78296521. The reversal of 78296513 is 31569287.

It can be written as a sum of positive squares in 4 ways, for example, as 60715264 + 17581249 = 7792^2 + 4193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78296513 - 2⁴ = 78296497 is a prime.

It is a super-2 number, since 2×78296513² = 12260687895918338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78296503) 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 7 ways as a sum of consecutive naturals, for example, 15233 + ... + 19713.

It is an arithmetic number, because the mean of its divisors is an integer number (9943317).

Almost surely, 2^78296513 is an apocalyptic number.

It is an amenable number.

78296513 is a deficient number, since it is larger than the sum of its proper divisors (1250023).

78296513 is a wasteful number, since it uses less digits than its factorization.

78296513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755.

The product of its digits is 90720, while the sum is 41.

The square root of 78296513 is about 8848.5316861048. The cubic root of 78296513 is about 427.8065933301.

The spelling of 78296513 in words is "seventy-eight million, two hundred ninety-six thousand, five hundred thirteen".