624242449 has 2 divisors, whose sum is σ = 624242450. Its totient is φ = 624242448.

The previous prime is 624242447. The next prime is 624242477. The reversal of 624242449 is 944242426.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316590849 + 307651600 = 17793^2 + 17540^2 .

It is a cyclic number.

It is not a de Polignac number, because 624242449 - 2¹ = 624242447 is a prime.

Together with 624242447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (624242447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312121224 + 312121225.

It is an arithmetic number, because the mean of its divisors is an integer number (312121225).

Almost surely, 2^624242449 is an apocalyptic number.

It is an amenable number.

624242449 is a deficient number, since it is larger than the sum of its proper divisors (1).

624242449 is an equidigital number, since it uses as much as digits as its factorization.

624242449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 37.

The square root of 624242449 is about 24984.8443861474. The cubic root of 624242449 is about 854.6423952809.

The spelling of 624242449 in words is "six hundred twenty-four million, two hundred forty-two thousand, four hundred forty-nine".