4237394621 has 2 divisors, whose sum is σ = 4237394622. Its totient is φ = 4237394620.

The previous prime is 4237394599. The next prime is 4237394647. The reversal of 4237394621 is 1264937324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4094592121 + 142802500 = 63989^2 + 11950^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4237394621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4237394521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2118697310 + 2118697311.

It is an arithmetic number, because the mean of its divisors is an integer number (2118697311).

Almost surely, 2^4237394621 is an apocalyptic number.

It is an amenable number.

4237394621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4237394621 is an equidigital number, since it uses as much as digits as its factorization.

4237394621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 4237394621 is about 65095.2734152027. The cubic root of 4237394621 is about 1618.2028820286.

The spelling of 4237394621 in words is "four billion, two hundred thirty-seven million, three hundred ninety-four thousand, six hundred twenty-one".