1678948457 has 8 divisors (see below), whose sum is σ = 1760844096. Its totient is φ = 1597794352.

The previous prime is 1678948399. The next prime is 1678948487. The reversal of 1678948457 is 7548498761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1678948457 - 2⁶ = 1678948393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1678948396 and 1678948405.

It is not an unprimeable number, because it can be changed into a prime (1678948487) 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 in 7 ways as a sum of consecutive naturals, for example, 180743 + ... + 189804.

It is an arithmetic number, because the mean of its divisors is an integer number (220105512).

Almost surely, 2^1678948457 is an apocalyptic number.

It is an amenable number.

1678948457 is a deficient number, since it is larger than the sum of its proper divisors (81895639).

1678948457 is a wasteful number, since it uses less digits than its factorization.

1678948457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370767.

The product of its digits is 13547520, while the sum is 59.

The square root of 1678948457 is about 40974.9735448359. The cubic root of 1678948457 is about 1188.5363114243.

The spelling of 1678948457 in words is "one billion, six hundred seventy-eight million, nine hundred forty-eight thousand, four hundred fifty-seven".