678009475 has 24 divisors (see below), whose sum is σ = 987718032. Its totient is φ = 455164800.

The previous prime is 678009469. The next prime is 678009481. The reversal of 678009475 is 574900876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (678009469) and next prime (678009481).

It is not a de Polignac number, because 678009475 - 2³ = 678009467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 91252 + ... + 98401.

It is an arithmetic number, because the mean of its divisors is an integer number (41154918).

Almost surely, 2^678009475 is an apocalyptic number.

678009475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

678009475 is a deficient number, since it is larger than the sum of its proper divisors (309708557).

678009475 is a wasteful number, since it uses less digits than its factorization.

678009475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189687 (or 189682 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 678009475 is about 26038.6150745388. The cubic root of 678009475 is about 878.5070566826.

The spelling of 678009475 in words is "six hundred seventy-eight million, nine thousand, four hundred seventy-five".