4897978 has 4 divisors (see below), whose sum is σ = 7346970. Its totient is φ = 2448988.

The previous prime is 4897973. The next prime is 4897993. The reversal of 4897978 is 8797984.

It is a happy number.

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., 4609609 + 288369 = 2147^2 + 537^2 .

It is not an unprimeable number, because it can be changed into a prime (4897973) 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 as a sum of consecutive naturals, namely, 1224493 + ... + 1224496.

Almost surely, 2^4897978 is an apocalyptic number.

4897978 is a deficient number, since it is larger than the sum of its proper divisors (2448992).

4897978 is a wasteful number, since it uses less digits than its factorization.

4897978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448991.

The product of its digits is 1016064, while the sum is 52.

The square root of 4897978 is about 2213.1375917462. The cubic root of 4897978 is about 169.8265589793.

The spelling of 4897978 in words is "four million, eight hundred ninety-seven thousand, nine hundred seventy-eight".