2621440039 has 2 divisors, whose sum is σ = 2621440040. Its totient is φ = 2621440038.

The previous prime is 2621440027. The next prime is 2621440043. The reversal of 2621440039 is 9300441262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621440039 - 2⁷ = 2621439911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621440009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310720019 + 1310720020.

It is an arithmetic number, because the mean of its divisors is an integer number (1310720020).

Almost surely, 2^2621440039 is an apocalyptic number.

2621440039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621440039 is an equidigital number, since it uses as much as digits as its factorization.

2621440039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2621440039 is about 51200.0003808594. Note that the first 3 decimals coincide. The cubic root of 2621440039 is about 1378.8382084582.

The spelling of 2621440039 in words is "two billion, six hundred twenty-one million, four hundred forty thousand, thirty-nine".