201454889 has 2 divisors, whose sum is σ = 201454890. Its totient is φ = 201454888.

The previous prime is 201454873. The next prime is 201454933. The reversal of 201454889 is 988454102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201412864 + 42025 = 14192^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 201454889 - 2⁴ = 201454873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201454849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100727444 + 100727445.

It is an arithmetic number, because the mean of its divisors is an integer number (100727445).

Almost surely, 2^201454889 is an apocalyptic number.

It is an amenable number.

201454889 is a deficient number, since it is larger than the sum of its proper divisors (1).

201454889 is an equidigital number, since it uses as much as digits as its factorization.

201454889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 201454889 is about 14193.4805104315. The cubic root of 201454889 is about 586.2181634004.

The spelling of 201454889 in words is "two hundred one million, four hundred fifty-four thousand, eight hundred eighty-nine".