423721747 has 2 divisors, whose sum is σ = 423721748. Its totient is φ = 423721746.

The previous prime is 423721741. The next prime is 423721759. The reversal of 423721747 is 747127324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423721747 - 2¹⁹ = 423197459 is a prime.

It is not a weakly prime, because it can be changed into another prime (423721741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211860873 + 211860874.

It is an arithmetic number, because the mean of its divisors is an integer number (211860874).

Almost surely, 2^423721747 is an apocalyptic number.

423721747 is a deficient number, since it is larger than the sum of its proper divisors (1).

423721747 is an equidigital number, since it uses as much as digits as its factorization.

423721747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 37.

The square root of 423721747 is about 20584.5025929703. The cubic root of 423721747 is about 751.0927756079.

The spelling of 423721747 in words is "four hundred twenty-three million, seven hundred twenty-one thousand, seven hundred forty-seven".