187481489 has 4 divisors (see below), whose sum is σ = 201903156. Its totient is φ = 173059824.

The previous prime is 187481461. The next prime is 187481507. The reversal of 187481489 is 984184781.

It is a happy number.

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 13690000 + 173791489 = 3700^2 + 13183^2 .

It is a cyclic number.

It is not a de Polignac number, because 187481489 - 2¹⁶ = 187415953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (187481089) 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, 7210814 + ... + 7210839.

It is an arithmetic number, because the mean of its divisors is an integer number (50475789).

Almost surely, 2^187481489 is an apocalyptic number.

It is an amenable number.

187481489 is a deficient number, since it is larger than the sum of its proper divisors (14421667).

187481489 is a wasteful number, since it uses less digits than its factorization.

187481489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14421666.

The product of its digits is 516096, while the sum is 50.

The square root of 187481489 is about 13692.3879947948. The cubic root of 187481489 is about 572.3382852743.

The spelling of 187481489 in words is "one hundred eighty-seven million, four hundred eighty-one thousand, four hundred eighty-nine".