202113649 has 2 divisors, whose sum is σ = 202113650. Its totient is φ = 202113648.

The previous prime is 202113619. The next prime is 202113661. The reversal of 202113649 is 946311202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201441249 + 672400 = 14193^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 202113649 - 2⁹ = 202113137 is a prime.

It is a super-2 number, since 2×202113649² = 81699854224190402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (202113619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101056824 + 101056825.

It is an arithmetic number, because the mean of its divisors is an integer number (101056825).

Almost surely, 2^202113649 is an apocalyptic number.

It is an amenable number.

202113649 is a deficient number, since it is larger than the sum of its proper divisors (1).

202113649 is an equidigital number, since it uses as much as digits as its factorization.

202113649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 202113649 is about 14216.6679992184. The cubic root of 202113649 is about 586.8564484075.

The spelling of 202113649 in words is "two hundred two million, one hundred thirteen thousand, six hundred forty-nine".