209462401 has 2 divisors, whose sum is σ = 209462402. Its totient is φ = 209462400.

The previous prime is 209462377. The next prime is 209462419. The reversal of 209462401 is 104264902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207388801 + 2073600 = 14401^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 209462401 - 2¹⁹ = 208938113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209462401.

It is not a weakly prime, because it can be changed into another prime (209460401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104731200 + 104731201.

It is an arithmetic number, because the mean of its divisors is an integer number (104731201).

Almost surely, 2^209462401 is an apocalyptic number.

It is an amenable number.

209462401 is a deficient number, since it is larger than the sum of its proper divisors (1).

209462401 is an equidigital number, since it uses as much as digits as its factorization.

209462401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 209462401 is about 14472.8159319463. The cubic root of 209462401 is about 593.8845481083.

The spelling of 209462401 in words is "two hundred nine million, four hundred sixty-two thousand, four hundred one".