423949951619 has 2 divisors, whose sum is σ = 423949951620. Its totient is φ = 423949951618.

The previous prime is 423949951571. The next prime is 423949951741. The reversal of 423949951619 is 916159949324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423949951619 - 2¹⁶ = 423949886083 is a prime.

It is a super-2 number, since 2×423949951619² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (423949951319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211974975809 + 211974975810.

It is an arithmetic number, because the mean of its divisors is an integer number (211974975810).

Almost surely, 2^423949951619 is an apocalyptic number.

423949951619 is a deficient number, since it is larger than the sum of its proper divisors (1).

423949951619 is an equidigital number, since it uses as much as digits as its factorization.

423949951619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18895680, while the sum is 62.

The spelling of 423949951619 in words is "four hundred twenty-three billion, nine hundred forty-nine million, nine hundred fifty-one thousand, six hundred nineteen".