1012828409 has 4 divisors (see below), whose sum is σ = 1012911360. Its totient is φ = 1012745460.

The previous prime is 1012828367. The next prime is 1012828441. The reversal of 1012828409 is 9048282101.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9048282101 = 83 ⋅109015447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012828409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012828469) 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 3 ways as a sum of consecutive naturals, for example, 19157 + ... + 48914.

It is an arithmetic number, because the mean of its divisors is an integer number (253227840).

Almost surely, 2^1012828409 is an apocalyptic number.

It is an amenable number.

1012828409 is a deficient number, since it is larger than the sum of its proper divisors (82951).

1012828409 is an equidigital number, since it uses as much as digits as its factorization.

1012828409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82950.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1012828409 is about 31824.9651845843. The cubic root of 1012828409 is about 1004.2579802050.

The spelling of 1012828409 in words is "one billion, twelve million, eight hundred twenty-eight thousand, four hundred nine".