1102989445 has 4 divisors (see below), whose sum is σ = 1323587340. Its totient is φ = 882391552.

The previous prime is 1102989439. The next prime is 1102989493. The reversal of 1102989445 is 5449892011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5449892011 = 17 ⋅320581883.

It can be written as a sum of positive squares in 2 ways, for example, as 177795556 + 925193889 = 13334^2 + 30417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102989445 - 2¹⁷ = 1102858373 is a prime.

It is a super-3 number, since 3×1102989445³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 110298940 + ... + 110298949.

It is an arithmetic number, because the mean of its divisors is an integer number (330896835).

Almost surely, 2^1102989445 is an apocalyptic number.

It is an amenable number.

1102989445 is a deficient number, since it is larger than the sum of its proper divisors (220597895).

1102989445 is an equidigital number, since it uses as much as digits as its factorization.

1102989445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220597894.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1102989445 is about 33211.2849043815. The cubic root of 1102989445 is about 1033.2144043379.

The spelling of 1102989445 in words is "one billion, one hundred two million, nine hundred eighty-nine thousand, four hundred forty-five".