201489469 has 4 divisors (see below), whose sum is σ = 201580540. Its totient is φ = 201398400.

The previous prime is 201489461. The next prime is 201489493. The reversal of 201489469 is 964984102.

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 4452100 + 197037369 = 2110^2 + 14037^2 .

It is a cyclic number.

It is not a de Polignac number, because 201489469 - 2³ = 201489461 is a prime.

It is a super-2 number, since 2×201489469² = 81196012235803922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201489461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42132 + ... + 46669.

It is an arithmetic number, because the mean of its divisors is an integer number (50395135).

Almost surely, 2^201489469 is an apocalyptic number.

It is an amenable number.

201489469 is a deficient number, since it is larger than the sum of its proper divisors (91071).

201489469 is an equidigital number, since it uses as much as digits as its factorization.

201489469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91070.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 201489469 is about 14194.6986230776. The cubic root of 201489469 is about 586.2517031909.

The spelling of 201489469 in words is "two hundred one million, four hundred eighty-nine thousand, four hundred sixty-nine".