459149981 has 2 divisors, whose sum is σ = 459149982. Its totient is φ = 459149980.

The previous prime is 459149927. The next prime is 459150037. The reversal of 459149981 is 189941954.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254402500 + 204747481 = 15950^2 + 14309^2 .

It is a cyclic number.

It is not a de Polignac number, because 459149981 - 2⁶ = 459149917 is a prime.

It is a super-2 number, since 2×459149981² = 421637410104600722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (459149921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229574990 + 229574991.

It is an arithmetic number, because the mean of its divisors is an integer number (229574991).

Almost surely, 2^459149981 is an apocalyptic number.

It is an amenable number.

459149981 is a deficient number, since it is larger than the sum of its proper divisors (1).

459149981 is an equidigital number, since it uses as much as digits as its factorization.

459149981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 459149981 is about 21427.7852565308. The cubic root of 459149981 is about 771.4684862145.

The spelling of 459149981 in words is "four hundred fifty-nine million, one hundred forty-nine thousand, nine hundred eighty-one".