1069128939 has 4 divisors (see below), whose sum is σ = 1425505256. Its totient is φ = 712752624.

The previous prime is 1069128923. The next prime is 1069128947. The reversal of 1069128939 is 9398219601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1069128939 - 2⁴ = 1069128923 is a prime.

It is a super-2 number, since 2×1069128939² = 2286073376414531442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1069128989) 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, 178188154 + ... + 178188159.

It is an arithmetic number, because the mean of its divisors is an integer number (356376314).

Almost surely, 2^1069128939 is an apocalyptic number.

1069128939 is a deficient number, since it is larger than the sum of its proper divisors (356376317).

1069128939 is an equidigital number, since it uses as much as digits as its factorization.

1069128939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356376316.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 1069128939 is about 32697.5372008352. The cubic root of 1069128939 is about 1022.5314984030.

The spelling of 1069128939 in words is "one billion, sixty-nine million, one hundred twenty-eight thousand, nine hundred thirty-nine".