201456289 has 2 divisors, whose sum is σ = 201456290. Its totient is φ = 201456288.

The previous prime is 201456187. The next prime is 201456331. The reversal of 201456289 is 982654102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201214225 + 242064 = 14185^2 + 492^2 .

It is a cyclic number.

It is not a de Polignac number, because 201456289 - 2¹³ = 201448097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201456589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100728144 + 100728145.

It is an arithmetic number, because the mean of its divisors is an integer number (100728145).

Almost surely, 2^201456289 is an apocalyptic number.

It is an amenable number.

201456289 is a deficient number, since it is larger than the sum of its proper divisors (1).

201456289 is an equidigital number, since it uses as much as digits as its factorization.

201456289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 201456289 is about 14193.5298287635. The cubic root of 201456289 is about 586.2195213612.

It can be divided in two parts, 201 and 456289, that added together give a triangular number (456490 = T₉₅₅).

The spelling of 201456289 in words is "two hundred one million, four hundred fifty-six thousand, two hundred eighty-nine".