1089795639 has 8 divisors (see below), whose sum is σ = 1454129280. Its totient is φ = 725996216.

The previous prime is 1089795587. The next prime is 1089795643. The reversal of 1089795639 is 9365979801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089795639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089795689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128769 + ... + 136970.

It is an arithmetic number, because the mean of its divisors is an integer number (181766160).

Almost surely, 2^1089795639 is an apocalyptic number.

1089795639 is a deficient number, since it is larger than the sum of its proper divisors (364333641).

1089795639 is a wasteful number, since it uses less digits than its factorization.

1089795639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267109.

The product of its (nonzero) digits is 3674160, while the sum is 57.

The square root of 1089795639 is about 33012.0529352538. The cubic root of 1089795639 is about 1029.0781455535.

The spelling of 1089795639 in words is "one billion, eighty-nine million, seven hundred ninety-five thousand, six hundred thirty-nine".