2521629989 has 2 divisors, whose sum is σ = 2521629990. Its totient is φ = 2521629988.

The previous prime is 2521629977. The next prime is 2521629991. The reversal of 2521629989 is 9899261252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1834665889 + 686964100 = 42833^2 + 26210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521629989 - 2²⁸ = 2253194533 is a prime.

Together with 2521629991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2521629989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521629949) 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, 1260814994 + 1260814995.

It is an arithmetic number, because the mean of its divisors is an integer number (1260814995).

Almost surely, 2^2521629989 is an apocalyptic number.

It is an amenable number.

2521629989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521629989 is an equidigital number, since it uses as much as digits as its factorization.

2521629989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 2521629989 is about 50215.8340466431. The cubic root of 2521629989 is about 1361.1117619460. Note that the first 3 decimals are identical.

The spelling of 2521629989 in words is "two billion, five hundred twenty-one million, six hundred twenty-nine thousand, nine hundred eighty-nine".