24720247 has 2 divisors, whose sum is σ = 24720248. Its totient is φ = 24720246.

The previous prime is 24720229. The next prime is 24720251. The reversal of 24720247 is 74202742.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24720247 is a prime.

It is a super-2 number, since 2×24720247² = 1222181223482018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24720257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12360123 + 12360124.

It is an arithmetic number, because the mean of its divisors is an integer number (12360124).

Almost surely, 2^24720247 is an apocalyptic number.

24720247 is a deficient number, since it is larger than the sum of its proper divisors (1).

24720247 is an equidigital number, since it uses as much as digits as its factorization.

24720247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 24720247 is about 4971.9459972932. The cubic root of 24720247 is about 291.3070097835.

Adding to 24720247 its reverse (74202742), we get a palindrome (98922989).

The spelling of 24720247 in words is "twenty-four million, seven hundred twenty thousand, two hundred forty-seven".