1069064021 has 4 divisors (see below), whose sum is σ = 1091810112. Its totient is φ = 1046317932.

The previous prime is 1069063981. The next prime is 1069064069. The reversal of 1069064021 is 1204609601.

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 an emirpimes, since its reverse is a distinct semiprime: 1204609601 = 13 ⋅92662277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1069064021 is a prime.

It is a super-2 number, since 2×1069064021² = 2285795761993376882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1069064221) 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, 11372975 + ... + 11373068.

It is an arithmetic number, because the mean of its divisors is an integer number (272952528).

Almost surely, 2^1069064021 is an apocalyptic number.

It is an amenable number.

1069064021 is a deficient number, since it is larger than the sum of its proper divisors (22746091).

1069064021 is an equidigital number, since it uses as much as digits as its factorization.

1069064021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22746090.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1069064021 is about 32696.5444810304. The cubic root of 1069064021 is about 1022.5108017901.

The spelling of 1069064021 in words is "one billion, sixty-nine million, sixty-four thousand, twenty-one".