423540149771 has 2 divisors, whose sum is σ = 423540149772. Its totient is φ = 423540149770.

The previous prime is 423540149731. The next prime is 423540149777. The reversal of 423540149771 is 177941045324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423540149771 - 2²² = 423535955467 is a prime.

It is a super-2 number, since 2×423540149771² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (423540149777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211770074885 + 211770074886.

It is an arithmetic number, because the mean of its divisors is an integer number (211770074886).

Almost surely, 2^423540149771 is an apocalyptic number.

423540149771 is a deficient number, since it is larger than the sum of its proper divisors (1).

423540149771 is an equidigital number, since it uses as much as digits as its factorization.

423540149771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 423540149771 in words is "four hundred twenty-three billion, five hundred forty million, one hundred forty-nine thousand, seven hundred seventy-one".