1622236729 has 3 divisors (see below), whose sum is σ = 1622277007. Its totient is φ = 1622196452.

The previous prime is 1622236717. The next prime is 1622236817. The reversal of 1622236729 is 9276322261.

The square root of 1622236729 is 40277.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1515155625 + 107081104 = 38925^2 + 10348^2 .

It is not a de Polignac number, because 1622236729 - 2⁵ = 1622236697 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1622236691 and 1622236700.

It is not an unprimeable number, because it can be changed into a prime (1622236129) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20139 + ... + 60415.

Almost surely, 2^1622236729 is an apocalyptic number.

1622236729 is the 40277-th square number.

1622236729 is the 20139-th centered octagonal number.

It is an amenable number.

1622236729 is a deficient number, since it is larger than the sum of its proper divisors (40278).

1622236729 is an frugal number, since it uses more digits than its factorization.

1622236729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80554 (or 40277 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The cubic root of 1622236729 is about 1175.0005683414. Note that the first 3 decimals are identical.

The spelling of 1622236729 in words is "one billion, six hundred twenty-two million, two hundred thirty-six thousand, seven hundred twenty-nine".