24219997 has 2 divisors, whose sum is σ = 24219998. Its totient is φ = 24219996.

The previous prime is 24219991. The next prime is 24220037. The reversal of 24219997 is 79991242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23921881 + 298116 = 4891^2 + 546^2 .

It is a cyclic number.

It is not a de Polignac number, because 24219997 - 2⁷ = 24219869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24219991) 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, 12109998 + 12109999.

It is an arithmetic number, because the mean of its divisors is an integer number (12109999).

Almost surely, 2^24219997 is an apocalyptic number.

It is an amenable number.

24219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

24219997 is an equidigital number, since it uses as much as digits as its factorization.

24219997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 24219997 is about 4921.3816149533. The cubic root of 24219997 is about 289.3285973951.

The spelling of 24219997 in words is "twenty-four million, two hundred nineteen thousand, nine hundred ninety-seven".