4067821069 has 4 divisors (see below), whose sum is σ = 4380730396. Its totient is φ = 3754911744.

The previous prime is 4067821067. The next prime is 4067821111. The reversal of 4067821069 is 9601287604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1506448969 + 2561372100 = 38813^2 + 50610^2 .

It is a cyclic number.

It is not a de Polignac number, because 4067821069 - 2¹ = 4067821067 is a prime.

It is a super-2 number, since 2×4067821069² = 33094336498800605522, 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 (4067821063) 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, 156454644 + ... + 156454669.

It is an arithmetic number, because the mean of its divisors is an integer number (1095182599).

Almost surely, 2^4067821069 is an apocalyptic number.

It is an amenable number.

4067821069 is a deficient number, since it is larger than the sum of its proper divisors (312909327).

4067821069 is a wasteful number, since it uses less digits than its factorization.

4067821069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312909326.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 4067821069 is about 63779.4721599356. The cubic root of 4067821069 is about 1596.3224219730.

The spelling of 4067821069 in words is "four billion, sixty-seven million, eight hundred twenty-one thousand, sixty-nine".