202639049 has 2 divisors, whose sum is σ = 202639050. Its totient is φ = 202639048.

The previous prime is 202639013. The next prime is 202639057. The reversal of 202639049 is 940936202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 2699449 = 14140^2 + 1643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202639049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202639649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101319524 + 101319525.

It is an arithmetic number, because the mean of its divisors is an integer number (101319525).

Almost surely, 2^202639049 is an apocalyptic number.

It is an amenable number.

202639049 is a deficient number, since it is larger than the sum of its proper divisors (1).

202639049 is an equidigital number, since it uses as much as digits as its factorization.

202639049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 202639049 is about 14235.1343161910. The cubic root of 202639049 is about 587.3645249115.

The spelling of 202639049 in words is "two hundred two million, six hundred thirty-nine thousand, forty-nine".