78703049 has 4 divisors (see below), whose sum is σ = 78720900. Its totient is φ = 78685200.

The previous prime is 78702977. The next prime is 78703061. The reversal of 78703049 is 94030787.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 18361225 = 7768^2 + 4285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78703049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78703949) 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, 2999 + ... + 12899.

It is an arithmetic number, because the mean of its divisors is an integer number (19680225).

Almost surely, 2^78703049 is an apocalyptic number.

It is an amenable number.

78703049 is a deficient number, since it is larger than the sum of its proper divisors (17851).

78703049 is an equidigital number, since it uses as much as digits as its factorization.

78703049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17850.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 78703049 is about 8871.4738910736. The cubic root of 78703049 is about 428.5457434713.

The spelling of 78703049 in words is "seventy-eight million, seven hundred three thousand, forty-nine".