273203981 has 2 divisors, whose sum is σ = 273203982. Its totient is φ = 273203980.

The previous prime is 273203977. The next prime is 273203989. The reversal of 273203981 is 189302372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256320100 + 16883881 = 16010^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 273203981 - 2² = 273203977 is a prime.

It is a super-2 number, since 2×273203981² = 149280830468496722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (273203989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136601990 + 136601991.

It is an arithmetic number, because the mean of its divisors is an integer number (136601991).

Almost surely, 2^273203981 is an apocalyptic number.

It is an amenable number.

273203981 is a deficient number, since it is larger than the sum of its proper divisors (1).

273203981 is an equidigital number, since it uses as much as digits as its factorization.

273203981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 273203981 is about 16528.8832351130. The cubic root of 273203981 is about 648.8769411892.

The spelling of 273203981 in words is "two hundred seventy-three million, two hundred three thousand, nine hundred eighty-one".