78970313 has 2 divisors, whose sum is σ = 78970314. Its totient is φ = 78970312.

The previous prime is 78970303. The next prime is 78970351. The reversal of 78970313 is 31307987.

It is a happy number.

It is an a-pointer prime, because the next prime (78970351) can be obtained adding 78970313 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 25270729 = 7328^2 + 5027^2 .

It is a cyclic number.

It is not a de Polignac number, because 78970313 - 2⁶ = 78970249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78970303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485156 + 39485157.

It is an arithmetic number, because the mean of its divisors is an integer number (39485157).

Almost surely, 2^78970313 is an apocalyptic number.

It is an amenable number.

78970313 is a deficient number, since it is larger than the sum of its proper divisors (1).

78970313 is an equidigital number, since it uses as much as digits as its factorization.

78970313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 78970313 is about 8886.5242361679. The cubic root of 78970313 is about 429.0302882135.

The spelling of 78970313 in words is "seventy-eight million, nine hundred seventy thousand, three hundred thirteen".