202981 has 2 divisors, whose sum is σ = 202982. Its totient is φ = 202980.

The previous prime is 202973. The next prime is 202987. The reversal of 202981 is 189202.

202981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 54756 = 385^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 202981 - 2³ = 202973 is a prime.

It is a super-2 number, since 2×202981² = 82402572722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101490 + 101491.

It is an arithmetic number, because the mean of its divisors is an integer number (101491).

2²⁰²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

202981 is a deficient number, since it is larger than the sum of its proper divisors (1).

202981 is an equidigital number, since it uses as much as digits as its factorization.

202981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 202981 is about 450.5341274532. The cubic root of 202981 is about 58.7694729473.

The spelling of 202981 in words is "two hundred two thousand, nine hundred eighty-one".