201230639 has 2 divisors, whose sum is σ = 201230640. Its totient is φ = 201230638.

The previous prime is 201230633. The next prime is 201230647. The reversal of 201230639 is 936032102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201230639 - 2²⁰ = 200182063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201230633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100615319 + 100615320.

It is an arithmetic number, because the mean of its divisors is an integer number (100615320).

Almost surely, 2^201230639 is an apocalyptic number.

201230639 is a deficient number, since it is larger than the sum of its proper divisors (1).

201230639 is an equidigital number, since it uses as much as digits as its factorization.

201230639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 201230639 is about 14185.5785571121. The cubic root of 201230639 is about 586.0005659156. Note that the first 3 decimals are identical.

The spelling of 201230639 in words is "two hundred one million, two hundred thirty thousand, six hundred thirty-nine".