424499861 has 2 divisors, whose sum is σ = 424499862. Its totient is φ = 424499860.

The previous prime is 424499851. The next prime is 424499893. The reversal of 424499861 is 168994424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423083761 + 1416100 = 20569^2 + 1190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424499861 is a 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 (424499851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212249930 + 212249931.

It is an arithmetic number, because the mean of its divisors is an integer number (212249931).

Almost surely, 2^424499861 is an apocalyptic number.

It is an amenable number.

424499861 is a deficient number, since it is larger than the sum of its proper divisors (1).

424499861 is an equidigital number, since it uses as much as digits as its factorization.

424499861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 424499861 is about 20603.3944048062. The cubic root of 424499861 is about 751.5522582944.

The spelling of 424499861 in words is "four hundred twenty-four million, four hundred ninety-nine thousand, eight hundred sixty-one".