202051639 has 2 divisors, whose sum is σ = 202051640. Its totient is φ = 202051638.

The previous prime is 202051589. The next prime is 202051667. The reversal of 202051639 is 936150202.

It is an a-pointer prime, because the next prime (202051667) can be obtained adding 202051639 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202051639 - 2⁹ = 202051127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202051039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101025819 + 101025820.

It is an arithmetic number, because the mean of its divisors is an integer number (101025820).

Almost surely, 2^202051639 is an apocalyptic number.

202051639 is a deficient number, since it is larger than the sum of its proper divisors (1).

202051639 is an equidigital number, since it uses as much as digits as its factorization.

202051639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 202051639 is about 14214.4869411456. The cubic root of 202051639 is about 586.7964249325.

The spelling of 202051639 in words is "two hundred two million, fifty-one thousand, six hundred thirty-nine".