480778391 has 2 divisors, whose sum is σ = 480778392. Its totient is φ = 480778390.

The previous prime is 480778387. The next prime is 480778409. The reversal of 480778391 is 193877084.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 480778391 - 2² = 480778387 is a prime.

It is a super-3 number, since 3×480778391³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (480778351) 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, 240389195 + 240389196.

It is an arithmetic number, because the mean of its divisors is an integer number (240389196).

Almost surely, 2^480778391 is an apocalyptic number.

480778391 is a deficient number, since it is larger than the sum of its proper divisors (1).

480778391 is an equidigital number, since it uses as much as digits as its factorization.

480778391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 480778391 is about 21926.6593670810. The cubic root of 480778391 is about 783.3965354568.

The spelling of 480778391 in words is "four hundred eighty million, seven hundred seventy-eight thousand, three hundred ninety-one".