2002539949 has 2 divisors, whose sum is σ = 2002539950. Its totient is φ = 2002539948.

The previous prime is 2002539947. The next prime is 2002540031. The reversal of 2002539949 is 9499352002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1904886025 + 97653924 = 43645^2 + 9882^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002539949 - 2¹ = 2002539947 is a prime.

Together with 2002539947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002539947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001269974 + 1001269975.

It is an arithmetic number, because the mean of its divisors is an integer number (1001269975).

Almost surely, 2^2002539949 is an apocalyptic number.

It is an amenable number.

2002539949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002539949 is an equidigital number, since it uses as much as digits as its factorization.

2002539949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 2002539949 is about 44749.7480328102. The cubic root of 2002539949 is about 1260.4541801397.

The spelling of 2002539949 in words is "two billion, two million, five hundred thirty-nine thousand, nine hundred forty-nine".