1089789025 has 12 divisors (see below), whose sum is σ = 1455287932. Its totient is φ = 804767040.

The previous prime is 1089789007. The next prime is 1089789031. The reversal of 1089789025 is 5209879801.

It can be written as a sum of positive squares in 6 ways, for example, as 36397089 + 1053391936 = 6033^2 + 32456^2 .

It is not a de Polignac number, because 1089789025 - 2⁵ = 1089788993 is a prime.

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 1089789025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1676274 + ... + 1676923.

Almost surely, 2^1089789025 is an apocalyptic number.

It is an amenable number.

1089789025 is a deficient number, since it is larger than the sum of its proper divisors (365498907).

1089789025 is a wasteful number, since it uses less digits than its factorization.

1089789025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353220 (or 3353215 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 1089789025 is about 33011.9527595688. The cubic root of 1089789025 is about 1029.0760637147.

The spelling of 1089789025 in words is "one billion, eighty-nine million, seven hundred eighty-nine thousand, twenty-five".