1102001989 has 4 divisors (see below), whose sum is σ = 1202184000. Its totient is φ = 1001819980.

The previous prime is 1102001983. The next prime is 1102002037. The reversal of 1102001989 is 9891002011.

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 1102001989 - 2⁷ = 1102001861 is a prime.

It is a super-2 number, since 2×1102001989² = 2428816767519912242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1102001989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102001983) 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, 50090989 + ... + 50091010.

It is an arithmetic number, because the mean of its divisors is an integer number (300546000).

Almost surely, 2^1102001989 is an apocalyptic number.

It is an amenable number.

1102001989 is a deficient number, since it is larger than the sum of its proper divisors (100182011).

1102001989 is a wasteful number, since it uses less digits than its factorization.

1102001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100182010.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1102001989 is about 33196.4153034631. The cubic root of 1102001989 is about 1032.9059824150.

The spelling of 1102001989 in words is "one billion, one hundred two million, one thousand, nine hundred eighty-nine".