4997921 has 2 divisors, whose sum is σ = 4997922. Its totient is φ = 4997920.

The previous prime is 4997917. The next prime is 4997929. The reversal of 4997921 is 1297994.

It is a happy number.

4997921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3763600 + 1234321 = 1940^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 4997921 - 2² = 4997917 is a prime.

It is not a weakly prime, because it can be changed into another prime (4997929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2498960 + 2498961.

It is an arithmetic number, because the mean of its divisors is an integer number (2498961).

Almost surely, 2^4997921 is an apocalyptic number.

It is an amenable number.

4997921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4997921 is an equidigital number, since it uses as much as digits as its factorization.

4997921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 4997921 is about 2235.6030506331. The cubic root of 4997921 is about 170.9738911154.

The spelling of 4997921 in words is "four million, nine hundred ninety-seven thousand, nine hundred twenty-one".