201406889 has 2 divisors, whose sum is σ = 201406890. Its totient is φ = 201406888.

The previous prime is 201406861. The next prime is 201406903. The reversal of 201406889 is 988604102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158961664 + 42445225 = 12608^2 + 6515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201406889 is a prime.

It is not a weakly prime, because it can be changed into another prime (201426889) 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, 100703444 + 100703445.

It is an arithmetic number, because the mean of its divisors is an integer number (100703445).

Almost surely, 2^201406889 is an apocalyptic number.

It is an amenable number.

201406889 is a deficient number, since it is larger than the sum of its proper divisors (1).

201406889 is an equidigital number, since it uses as much as digits as its factorization.

201406889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 201406889 is about 14191.7894925200. The cubic root of 201406889 is about 586.1716009382.

The spelling of 201406889 in words is "two hundred one million, four hundred six thousand, eight hundred eighty-nine".