978765419 has 2 divisors, whose sum is σ = 978765420. Its totient is φ = 978765418.

The previous prime is 978765379. The next prime is 978765443. The reversal of 978765419 is 914567879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978765419 - 2⁸ = 978765163 is a prime.

It is a super-2 number, since 2×978765419² = 1915963490860491122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978765499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489382709 + 489382710.

It is an arithmetic number, because the mean of its divisors is an integer number (489382710).

Almost surely, 2^978765419 is an apocalyptic number.

978765419 is a deficient number, since it is larger than the sum of its proper divisors (1).

978765419 is an equidigital number, since it uses as much as digits as its factorization.

978765419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 56.

The square root of 978765419 is about 31285.2268491056. The cubic root of 978765419 is about 992.8711059694.

The spelling of 978765419 in words is "nine hundred seventy-eight million, seven hundred sixty-five thousand, four hundred nineteen".