4978997 has 4 divisors (see below), whose sum is σ = 5028396. Its totient is φ = 4929600.

The previous prime is 4978993. The next prime is 4979021. The reversal of 4978997 is 7998794.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 2588881 = 1546^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978997 - 2² = 4978993 is a prime.

It is a super-2 number, since 2×4978997² = 49580822252018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24548 + ... + 24749.

It is an arithmetic number, because the mean of its divisors is an integer number (1257099).

Almost surely, 2^4978997 is an apocalyptic number.

It is an amenable number.

4978997 is a deficient number, since it is larger than the sum of its proper divisors (49399).

4978997 is a wasteful number, since it uses less digits than its factorization.

4978997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49398.

The product of its digits is 1143072, while the sum is 53.

The square root of 4978997 is about 2231.3666216021. The cubic root of 4978997 is about 170.7578278000.

The spelling of 4978997 in words is "four million, nine hundred seventy-eight thousand, nine hundred ninety-seven".