2621606249 has 2 divisors, whose sum is σ = 2621606250. Its totient is φ = 2621606248.

The previous prime is 2621606243. The next prime is 2621606287. The reversal of 2621606249 is 9426061262.

It is an a-pointer prime, because the next prime (2621606287) can be obtained adding 2621606249 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., 2412283225 + 209323024 = 49115^2 + 14468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621606249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2621606243) 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, 1310803124 + 1310803125.

It is an arithmetic number, because the mean of its divisors is an integer number (1310803125).

Almost surely, 2^2621606249 is an apocalyptic number.

It is an amenable number.

2621606249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621606249 is an equidigital number, since it uses as much as digits as its factorization.

2621606249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 2621606249 is about 51201.6234996509. The cubic root of 2621606249 is about 1378.8673491661.

The spelling of 2621606249 in words is "two billion, six hundred twenty-one million, six hundred six thousand, two hundred forty-nine".