1423141981 has 2 divisors, whose sum is σ = 1423141982. Its totient is φ = 1423141980.

The previous prime is 1423141921. The next prime is 1423142023. The reversal of 1423141981 is 1891413241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1215637956 + 207504025 = 34866^2 + 14405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423141981 is a prime.

It is a super-2 number, since 2×1423141981² = 4050666196169208722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423141921) 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, 711570990 + 711570991.

It is an arithmetic number, because the mean of its divisors is an integer number (711570991).

Almost surely, 2^1423141981 is an apocalyptic number.

It is an amenable number.

1423141981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423141981 is an equidigital number, since it uses as much as digits as its factorization.

1423141981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 1423141981 is about 37724.5540861652. The cubic root of 1423141981 is about 1124.8192581406.

The spelling of 1423141981 in words is "one billion, four hundred twenty-three million, one hundred forty-one thousand, nine hundred eighty-one".