1622720089 has 3 divisors (see below), whose sum is σ = 1622760373. Its totient is φ = 1622679806.

The previous prime is 1622720009. The next prime is 1622720117. The reversal of 1622720089 is 9800272261.

The square root of 1622720089 is 40283.

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 is not a de Polignac number, because 1622720089 - 2¹⁹ = 1622195801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622720009) 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, 20142 + ... + 60424.

Almost surely, 2^1622720089 is an apocalyptic number.

1622720089 is the 40283-rd square number.

1622720089 is the 20142-nd centered octagonal number.

It is an amenable number.

1622720089 is a deficient number, since it is larger than the sum of its proper divisors (40284).

1622720089 is an frugal number, since it uses more digits than its factorization.

1622720089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80566 (or 40283 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The cubic root of 1622720089 is about 1175.1172574093.

The spelling of 1622720089 in words is "one billion, six hundred twenty-two million, seven hundred twenty thousand, eighty-nine".