5669978 has 4 divisors (see below), whose sum is σ = 8504970. Its totient is φ = 2834988.

The previous prime is 5669977. The next prime is 5670031. The reversal of 5669978 is 8799665.

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., 3003289 + 2666689 = 1733^2 + 1633^2 .

It is not an unprimeable number, because it can be changed into a prime (5669971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1417493 + ... + 1417496.

Almost surely, 2^5669978 is an apocalyptic number.

5669978 is a deficient number, since it is larger than the sum of its proper divisors (2834992).

5669978 is a wasteful number, since it uses less digits than its factorization.

5669978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834991.

The product of its digits is 816480, while the sum is 50.

The square root of 5669978 is about 2381.1715603879. The cubic root of 5669978 is about 178.3174279542.

Adding to 5669978 its sum of digits (50), we get a triangular number (5670028 = T₃₃₆₇).

The spelling of 5669978 in words is "five million, six hundred sixty-nine thousand, nine hundred seventy-eight".