78803117 has 2 divisors, whose sum is σ = 78803118. Its totient is φ = 78803116.

The previous prime is 78803111. The next prime is 78803141. The reversal of 78803117 is 71130887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71588521 + 7214596 = 8461^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 78803117 - 2¹⁴ = 78786733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78803111) 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 as a sum of consecutive naturals, namely, 39401558 + 39401559.

It is an arithmetic number, because the mean of its divisors is an integer number (39401559).

Almost surely, 2^78803117 is an apocalyptic number.

It is an amenable number.

78803117 is a deficient number, since it is larger than the sum of its proper divisors (1).

78803117 is an equidigital number, since it uses as much as digits as its factorization.

78803117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 78803117 is about 8877.1119740600. Note that the first 3 decimals coincide. The cubic root of 78803117 is about 428.7272932071.

The spelling of 78803117 in words is "seventy-eight million, eight hundred three thousand, one hundred seventeen".