678000449 has 4 divisors (see below), whose sum is σ = 774857664. Its totient is φ = 581143236.

The previous prime is 678000437. The next prime is 678000451. The reversal of 678000449 is 944000876.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678000449 - 2¹² = 677996353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678050449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48428597 + ... + 48428610.

It is an arithmetic number, because the mean of its divisors is an integer number (193714416).

Almost surely, 2^678000449 is an apocalyptic number.

It is an amenable number.

678000449 is a deficient number, since it is larger than the sum of its proper divisors (96857215).

678000449 is an equidigital number, since it uses as much as digits as its factorization.

678000449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96857214.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 678000449 is about 26038.4417544522. The cubic root of 678000449 is about 878.5031582907.

The spelling of 678000449 in words is "six hundred seventy-eight million, four hundred forty-nine", and thus it is an aban number.