200402981 has 2 divisors, whose sum is σ = 200402982. Its totient is φ = 200402980.

The previous prime is 200402977. The next prime is 200403023. The reversal of 200402981 is 189204002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165533956 + 34869025 = 12866^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 200402981 - 2² = 200402977 is a prime.

It is a super-2 number, since 2×200402981² = 80322709587372722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200402981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200402921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100201490 + 100201491.

It is an arithmetic number, because the mean of its divisors is an integer number (100201491).

Almost surely, 2^200402981 is an apocalyptic number.

It is an amenable number.

200402981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200402981 is an equidigital number, since it uses as much as digits as its factorization.

200402981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 200402981 is about 14156.3759839869. The cubic root of 200402981 is about 585.1960586671.

Adding to 200402981 its reverse (189204002), we get a palindrome (389606983).

The spelling of 200402981 in words is "two hundred million, four hundred two thousand, nine hundred eighty-one".