201254989 has 4 divisors (see below), whose sum is σ = 216736156. Its totient is φ = 185773824.

The previous prime is 201254971. The next prime is 201255001. The reversal of 201254989 is 989452102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48930025 + 152324964 = 6995^2 + 12342^2 .

It is a cyclic number.

It is not a de Polignac number, because 201254989 - 2⁷ = 201254861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201254929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7740564 + ... + 7740589.

It is an arithmetic number, because the mean of its divisors is an integer number (54184039).

Almost surely, 2^201254989 is an apocalyptic number.

It is an amenable number.

201254989 is a deficient number, since it is larger than the sum of its proper divisors (15481167).

201254989 is a wasteful number, since it uses less digits than its factorization.

201254989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15481166.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 201254989 is about 14186.4367971665. The cubic root of 201254989 is about 586.0242013791.

The spelling of 201254989 in words is "two hundred one million, two hundred fifty-four thousand, nine hundred eighty-nine".