78812003 has 2 divisors, whose sum is σ = 78812004. Its totient is φ = 78812002.

The previous prime is 78811987. The next prime is 78812021. The reversal of 78812003 is 30021887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78812003 - 2⁴ = 78811987 is a prime.

It is a super-2 number, since 2×78812003² = 12422663633744018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78812203) 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, 39406001 + 39406002.

It is an arithmetic number, because the mean of its divisors is an integer number (39406002).

Almost surely, 2^78812003 is an apocalyptic number.

78812003 is a deficient number, since it is larger than the sum of its proper divisors (1).

78812003 is an equidigital number, since it uses as much as digits as its factorization.

78812003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 78812003 is about 8877.6124605662. The cubic root of 78812003 is about 428.7434073224.

The spelling of 78812003 in words is "seventy-eight million, eight hundred twelve thousand, three".