202340981 has 2 divisors, whose sum is σ = 202340982. Its totient is φ = 202340980.

The previous prime is 202340977. The next prime is 202340989. The reversal of 202340981 is 189043202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145202500 + 57138481 = 12050^2 + 7559^2 .

It is a cyclic number.

It is not a de Polignac number, because 202340981 - 2² = 202340977 is a prime.

It is a super-2 number, since 2×202340981² = 81883745184084722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202340989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101170490 + 101170491.

It is an arithmetic number, because the mean of its divisors is an integer number (101170491).

Almost surely, 2^202340981 is an apocalyptic number.

It is an amenable number.

202340981 is a deficient number, since it is larger than the sum of its proper divisors (1).

202340981 is an equidigital number, since it uses as much as digits as its factorization.

202340981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 202340981 is about 14224.6610152931. The cubic root of 202340981 is about 587.0763927521.

The spelling of 202340981 in words is "two hundred two million, three hundred forty thousand, nine hundred eighty-one".