1863227489 has 4 divisors (see below), whose sum is σ = 1972829124. Its totient is φ = 1753625856.

The previous prime is 1863227459. The next prime is 1863227501. The reversal of 1863227489 is 9847223681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9847223681 = 3517 ⋅2799893.

It can be written as a sum of positive squares in 2 ways, for example, as 645566464 + 1217661025 = 25408^2 + 34895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1863227489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1863227449) 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, 54800792 + ... + 54800825.

It is an arithmetic number, because the mean of its divisors is an integer number (493207281).

Almost surely, 2^1863227489 is an apocalyptic number.

It is an amenable number.

1863227489 is a deficient number, since it is larger than the sum of its proper divisors (109601635).

1863227489 is a wasteful number, since it uses less digits than its factorization.

1863227489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109601634.

The product of its digits is 1161216, while the sum is 50.

The square root of 1863227489 is about 43165.1188924576. The cubic root of 1863227489 is about 1230.5198606689.

The spelling of 1863227489 in words is "one billion, eight hundred sixty-three million, two hundred twenty-seven thousand, four hundred eighty-nine".