1969989 has 8 divisors (see below), whose sum is σ = 3001920. Its totient is φ = 1125696.

The previous prime is 1969987. The next prime is 1969993. The reversal of 1969989 is 9899691.

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

It is not a de Polignac number, because 1969989 - 2¹ = 1969987 is a prime.

1969989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46884 + ... + 46925.

It is an arithmetic number, because the mean of its divisors is an integer number (375240).

2^1969989 is an apocalyptic number.

It is an amenable number.

1969989 is a deficient number, since it is larger than the sum of its proper divisors (1031931).

1969989 is an equidigital number, since it uses as much as digits as its factorization.

1969989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93819.

The product of its digits is 314928, while the sum is 51.

The square root of 1969989 is about 1403.5629661686. The cubic root of 1969989 is about 125.3587348231.

The spelling of 1969989 in words is "one million, nine hundred sixty-nine thousand, nine hundred eighty-nine".