1407989 has 8 divisors (see below), whose sum is σ = 1585920. Its totient is φ = 1238400.

The previous prime is 1407971. The next prime is 1407997. The reversal of 1407989 is 9897041.

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 1407989 - 2¹² = 1403893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1407389) 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, 1724 + ... + 2405.

It is an arithmetic number, because the mean of its divisors is an integer number (198240).

2^1407989 is an apocalyptic number.

It is an amenable number.

1407989 is a deficient number, since it is larger than the sum of its proper divisors (177931).

1407989 is a wasteful number, since it uses less digits than its factorization.

1407989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1407989 is about 1186.5871228022. The cubic root of 1407989 is about 112.0812813464.

The spelling of 1407989 in words is "one million, four hundred seven thousand, nine hundred eighty-nine".