1319102989 has 4 divisors (see below), whose sum is σ = 1319454556.
Its totient is φ = 1318751424.
The previous prime is 1319102957. The next prime is 1319102999. The reversal of 1319102989 is 9892019131.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 686178025 + 632924964 = 26195^2 + 25158^2
It is a cyclic number.
It is not a de Polignac number, because 1319102989 - 25 = 1319102957 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 (1319102929) 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, 170094 + ... + 177679.
It is an arithmetic number, because the mean of its divisors is an integer number (329863639).
Almost surely, 21319102989 is an apocalyptic number.
It is an amenable number.
1319102989 is a deficient number, since it is larger than the sum of its proper divisors (351567).
1319102989 is an equidigital number, since it uses as much as digits as its factorization.
1319102989 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 351566.
The product of its (nonzero) digits is 34992, while the sum is 43.
The square root of 1319102989 is about 36319.4574436348.
The cubic root of 1319102989 is about 1096.7127727752.
The spelling of 1319102989 in words is "one billion, three hundred nineteen million, one hundred two thousand, nine hundred eighty-nine".