19440959 has 2 divisors, whose sum is σ = 19440960. Its totient is φ = 19440958.

The previous prime is 19440931. The next prime is 19440973. The reversal of 19440959 is 95904491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19440959 - 2²⁰ = 18392383 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19440989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720479 + 9720480.

It is an arithmetic number, because the mean of its divisors is an integer number (9720480).

Almost surely, 2^19440959 is an apocalyptic number.

19440959 is a deficient number, since it is larger than the sum of its proper divisors (1).

19440959 is an equidigital number, since it uses as much as digits as its factorization.

19440959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 19440959 is about 4409.1902884770. The cubic root of 19440959 is about 268.8887061890. Note that the first 3 decimals are identical.

The spelling of 19440959 in words is "nineteen million, four hundred forty thousand, nine hundred fifty-nine".