1427907989 has 4 divisors (see below), whose sum is σ = 1428138624. Its totient is φ = 1427677356.

The previous prime is 1427907977. The next prime is 1427908021. The reversal of 1427907989 is 9897097241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9897097241 = 701 ⋅14118541.

It is a cyclic number.

It is not a de Polignac number, because 1427907989 - 2⁴ = 1427907973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427907289) 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, 105767 + ... + 118500.

It is an arithmetic number, because the mean of its divisors is an integer number (357034656).

Almost surely, 2^1427907989 is an apocalyptic number.

It is an amenable number.

1427907989 is a deficient number, since it is larger than the sum of its proper divisors (230635).

1427907989 is an equidigital number, since it uses as much as digits as its factorization.

1427907989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230634.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The square root of 1427907989 is about 37787.6698011402. The cubic root of 1427907989 is about 1126.0735073848.

The spelling of 1427907989 in words is "one billion, four hundred twenty-seven million, nine hundred seven thousand, nine hundred eighty-nine".