1069212989 has 4 divisors (see below), whose sum is σ = 1151460156. Its totient is φ = 986965824.

The previous prime is 1069212979. The next prime is 1069212997. The reversal of 1069212989 is 9892129601.

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 113784889 + 955428100 = 10667^2 + 30910^2 .

It is not a de Polignac number, because 1069212989 - 2¹² = 1069208893 is a prime.

It is a super-2 number, since 2×1069212989² = 2286432831692628242, 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 (1069212929) 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, 41123564 + ... + 41123589.

It is an arithmetic number, because the mean of its divisors is an integer number (287865039).

Almost surely, 2^1069212989 is an apocalyptic number.

It is an amenable number.

1069212989 is a deficient number, since it is larger than the sum of its proper divisors (82247167).

1069212989 is an equidigital number, since it uses as much as digits as its factorization.

1069212989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82247166.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 1069212989 is about 32698.8224405712. The cubic root of 1069212989 is about 1022.5582932753.

The spelling of 1069212989 in words is "one billion, sixty-nine million, two hundred twelve thousand, nine hundred eighty-nine".