78930419 has 2 divisors, whose sum is σ = 78930420. Its totient is φ = 78930418.

The previous prime is 78930403. The next prime is 78930421. The reversal of 78930419 is 91403987.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78930419 - 2⁴ = 78930403 is a prime.

It is a super-2 number, since 2×78930419² = 12460022087031122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 78930421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78930469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39465209 + 39465210.

It is an arithmetic number, because the mean of its divisors is an integer number (39465210).

Almost surely, 2^78930419 is an apocalyptic number.

78930419 is a deficient number, since it is larger than the sum of its proper divisors (1).

78930419 is an equidigital number, since it uses as much as digits as its factorization.

78930419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 78930419 is about 8884.2793179863. The cubic root of 78930419 is about 428.9580306075.

The spelling of 78930419 in words is "seventy-eight million, nine hundred thirty thousand, four hundred nineteen".