780498379 has 2 divisors, whose sum is σ = 780498380. Its totient is φ = 780498378.

The previous prime is 780498371. The next prime is 780498391. The reversal of 780498379 is 973894087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 780498379 - 2³ = 780498371 is a prime.

It is not a weakly prime, because it can be changed into another prime (780498371) 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, 390249189 + 390249190.

It is an arithmetic number, because the mean of its divisors is an integer number (390249190).

Almost surely, 2^780498379 is an apocalyptic number.

780498379 is a deficient number, since it is larger than the sum of its proper divisors (1).

780498379 is an equidigital number, since it uses as much as digits as its factorization.

780498379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 780498379 is about 27937.4010781246. The cubic root of 780498379 is about 920.7124203766.

The spelling of 780498379 in words is "seven hundred eighty million, four hundred ninety-eight thousand, three hundred seventy-nine".