1072644169 has 4 divisors (see below), whose sum is σ = 1119280896. Its totient is φ = 1026007444.

The previous prime is 1072644161. The next prime is 1072644187. The reversal of 1072644169 is 9614462701.

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 1072644169 - 2³ = 1072644161 is a prime.

It is a super-2 number, since 2×1072644169² = 2301131026579401122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1072644161) 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, 23318329 + ... + 23318374.

It is an arithmetic number, because the mean of its divisors is an integer number (279820224).

Almost surely, 2^1072644169 is an apocalyptic number.

It is an amenable number.

1072644169 is a deficient number, since it is larger than the sum of its proper divisors (46636727).

1072644169 is an equidigital number, since it uses as much as digits as its factorization.

1072644169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46636726.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1072644169 is about 32751.2468312277. The cubic root of 1072644169 is about 1023.6509459031.

The spelling of 1072644169 in words is "one billion, seventy-two million, six hundred forty-four thousand, one hundred sixty-nine".