1431989 has 8 divisors (see below), whose sum is σ = 1569120. Its totient is φ = 1298736.

The previous prime is 1431977. The next prime is 1432001. The reversal of 1431989 is 9891341.

It is an interprime number because it is at equal distance from previous prime (1431977) and next prime (1432001).

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 1431989 - 2⁸ = 1431733 is a prime.

It is a super-2 number, since 2×1431989² = 4101184992242, which contains 22 as substring.

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 (1431919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (196140).

2^1431989 is an apocalyptic number.

It is an amenable number.

1431989 is a deficient number, since it is larger than the sum of its proper divisors (137131).

1431989 is a wasteful number, since it uses less digits than its factorization.

1431989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its digits is 7776, while the sum is 35.

The square root of 1431989 is about 1196.6574280052. The cubic root of 1431989 is about 112.7145272814.

The spelling of 1431989 in words is "one million, four hundred thirty-one thousand, nine hundred eighty-nine".