22379509 has 2 divisors, whose sum is σ = 22379510. Its totient is φ = 22379508.

The previous prime is 22379491. The next prime is 22379543. The reversal of 22379509 is 90597322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 2102500 = 4503^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 22379509 - 2⁷ = 22379381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22379309) 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 as a sum of consecutive naturals, namely, 11189754 + 11189755.

It is an arithmetic number, because the mean of its divisors is an integer number (11189755).

Almost surely, 2^22379509 is an apocalyptic number.

It is an amenable number.

22379509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22379509 is an equidigital number, since it uses as much as digits as its factorization.

22379509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 22379509 is about 4730.6985742066. The cubic root of 22379509 is about 281.8059669886.

The spelling of 22379509 in words is "twenty-two million, three hundred seventy-nine thousand, five hundred nine".