5921978 has 4 divisors (see below), whose sum is σ = 8882970. Its totient is φ = 2960988.

The previous prime is 5921959. The next prime is 5921989. The reversal of 5921978 is 8791295.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5841889 + 80089 = 2417^2 + 283^2 .

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 as a sum of consecutive naturals, namely, 1480493 + ... + 1480496.

Almost surely, 2^5921978 is an apocalyptic number.

5921978 is a deficient number, since it is larger than the sum of its proper divisors (2960992).

5921978 is a wasteful number, since it uses less digits than its factorization.

5921978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960991.

The product of its digits is 45360, while the sum is 41.

The square root of 5921978 is about 2433.5114546679. The cubic root of 5921978 is about 180.9209793134.

The spelling of 5921978 in words is "five million, nine hundred twenty-one thousand, nine hundred seventy-eight".