1199989 has 4 divisors (see below), whose sum is σ = 1371424. Its totient is φ = 1028556.

The previous prime is 1199969. The next prime is 1199993. The reversal of 1199989 is 9899911.

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.

It is a cyclic number.

It is not a de Polignac number, because 1199989 - 2⁹ = 1199477 is a prime.

It is a super-4 number, since 4×1199989⁴ (a number of 25 digits) contains 4444 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199909) 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, 85707 + ... + 85720.

It is an arithmetic number, because the mean of its divisors is an integer number (342856).

2^1199989 is an apocalyptic number.

It is an amenable number.

1199989 is a deficient number, since it is larger than the sum of its proper divisors (171435).

1199989 is an equidigital number, since it uses as much as digits as its factorization.

1199989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171434.

The product of its digits is 52488, while the sum is 46.

The square root of 1199989 is about 1095.4400942087. The cubic root of 1199989 is about 106.2655322160.

It can be divided in two parts, 1199 and 989, that multiplied together give a palindrome (1185811).

The spelling of 1199989 in words is "one million, one hundred ninety-nine thousand, nine hundred eighty-nine".