1978603 has 8 divisors (see below), whose sum is σ = 2272320. Its totient is φ = 1703880.

The previous prime is 1978597. The next prime is 1978631. The reversal of 1978603 is 3068791.

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 1978603 - 2⁹ = 1978091 is a prime.

It is a Duffinian number.

1978603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1978663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4525 + ... + 4942.

It is an arithmetic number, because the mean of its divisors is an integer number (284040).

2^1978603 is an apocalyptic number.

1978603 is a deficient number, since it is larger than the sum of its proper divisors (293717).

1978603 is a wasteful number, since it uses less digits than its factorization.

1978603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1978603 is about 1406.6282380217. The cubic root of 1978603 is about 125.5411842422.

The spelling of 1978603 in words is "one million, nine hundred seventy-eight thousand, six hundred three".