1427566989 has 8 divisors (see below), whose sum is σ = 1917316800. Its totient is φ = 944764256.

The previous prime is 1427566981. The next prime is 1427567017. The reversal of 1427566989 is 9896657241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1427566989 - 2³ = 1427566981 is a prime.

It is a super-2 number, since 2×1427566989² = 4075895016165052242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427566981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736289 + ... + 1737110.

It is an arithmetic number, because the mean of its divisors is an integer number (239664600).

Almost surely, 2^1427566989 is an apocalyptic number.

It is an amenable number.

1427566989 is a deficient number, since it is larger than the sum of its proper divisors (489749811).

1427566989 is a wasteful number, since it uses less digits than its factorization.

1427566989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473539.

The product of its digits is 6531840, while the sum is 57.

The square root of 1427566989 is about 37783.1574779028. The cubic root of 1427566989 is about 1125.9838607035.

The spelling of 1427566989 in words is "one billion, four hundred twenty-seven million, five hundred sixty-six thousand, nine hundred eighty-nine".