78903413 has 2 divisors, whose sum is σ = 78903414. Its totient is φ = 78903412.

The previous prime is 78903367. The next prime is 78903431. The reversal of 78903413 is 31430987.

Together with next prime (78903431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 27952369 = 7138^2 + 5287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78903413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78903313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451706 + 39451707.

It is an arithmetic number, because the mean of its divisors is an integer number (39451707).

Almost surely, 2^78903413 is an apocalyptic number.

It is an amenable number.

78903413 is a deficient number, since it is larger than the sum of its proper divisors (1).

78903413 is an equidigital number, since it uses as much as digits as its factorization.

78903413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 78903413 is about 8882.7593122858. The cubic root of 78903413 is about 428.9091024411.

The spelling of 78903413 in words is "seventy-eight million, nine hundred three thousand, four hundred thirteen".