2061509939 has 2 divisors, whose sum is σ = 2061509940. Its totient is φ = 2061509938.

The previous prime is 2061509929. The next prime is 2061510001. The reversal of 2061509939 is 9399051602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2061509939 - 2⁸ = 2061509683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2061509939.

It is not a weakly prime, because it can be changed into another prime (2061509929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030754969 + 1030754970.

It is an arithmetic number, because the mean of its divisors is an integer number (1030754970).

Almost surely, 2^2061509939 is an apocalyptic number.

2061509939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061509939 is an equidigital number, since it uses as much as digits as its factorization.

2061509939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 2061509939 is about 45403.8537901795. The cubic root of 2061509939 is about 1272.7071315318.

It can be divided in two parts, 2061 and 509939, that added together give a cube (512000 = 80³).

The spelling of 2061509939 in words is "two billion, sixty-one million, five hundred nine thousand, nine hundred thirty-nine".