4913621 has 2 divisors, whose sum is σ = 4913622. Its totient is φ = 4913620.

The previous prime is 4913617. The next prime is 4913627. The reversal of 4913621 is 1263194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4906225 + 7396 = 2215^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 4913621 - 2² = 4913617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₃₄₂₈₇₂ and since 4913621 and 342872 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4913627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2456810 + 2456811.

It is an arithmetic number, because the mean of its divisors is an integer number (2456811).

Almost surely, 2^4913621 is an apocalyptic number.

It is an amenable number.

4913621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4913621 is an equidigital number, since it uses as much as digits as its factorization.

4913621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 4913621 is about 2216.6688972420. The cubic root of 4913621 is about 170.0071623280.

The spelling of 4913621 in words is "four million, nine hundred thirteen thousand, six hundred twenty-one".