78159313 has 8 divisors (see below), whose sum is σ = 81664128. Its totient is φ = 74663424.

The previous prime is 78159299. The next prime is 78159329. The reversal of 78159313 is 31395187.

It is a happy number.

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 78159313 - 2²⁵ = 44604881 is a prime.

It is a super-2 number, since 2×78159313² = 12217756417263938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78159343) 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, 20881 + ... + 24337.

It is an arithmetic number, because the mean of its divisors is an integer number (10208016).

Almost surely, 2^78159313 is an apocalyptic number.

It is an amenable number.

78159313 is a deficient number, since it is larger than the sum of its proper divisors (3504815).

78159313 is a wasteful number, since it uses less digits than its factorization.

78159313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463.

The product of its digits is 22680, while the sum is 37.

The square root of 78159313 is about 8840.7755881484. The cubic root of 78159313 is about 427.5565635403.

The spelling of 78159313 in words is "seventy-eight million, one hundred fifty-nine thousand, three hundred thirteen".