391780483 has 2 divisors, whose sum is σ = 391780484. Its totient is φ = 391780482.

The previous prime is 391780463. The next prime is 391780507. The reversal of 391780483 is 384087193.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 391780483 - 2¹³ = 391772291 is a prime.

It is not a weakly prime, because it can be changed into another prime (391780463) 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, 195890241 + 195890242.

It is an arithmetic number, because the mean of its divisors is an integer number (195890242).

Almost surely, 2^391780483 is an apocalyptic number.

391780483 is a deficient number, since it is larger than the sum of its proper divisors (1).

391780483 is an equidigital number, since it uses as much as digits as its factorization.

391780483 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 391780483 is about 19793.4454555037. The cubic root of 391780483 is about 731.7245042832.

The spelling of 391780483 in words is "three hundred ninety-one million, seven hundred eighty thousand, four hundred eighty-three".