4997621 has 2 divisors, whose sum is σ = 4997622. Its totient is φ = 4997620.

The previous prime is 4997611. The next prime is 4997659. The reversal of 4997621 is 1267994.

It is an a-pointer prime, because the next prime (4997659) can be obtained adding 4997621 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 1406596 = 1895^2 + 1186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4997621 - 2¹⁴ = 4981237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4997611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2498810 + 2498811.

It is an arithmetic number, because the mean of its divisors is an integer number (2498811).

Almost surely, 2^4997621 is an apocalyptic number.

It is an amenable number.

4997621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4997621 is an equidigital number, since it uses as much as digits as its factorization.

4997621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 4997621 is about 2235.5359536362. The cubic root of 4997621 is about 170.9704701468.

The spelling of 4997621 in words is "four million, nine hundred ninety-seven thousand, six hundred twenty-one".