1423423381 has 2 divisors, whose sum is σ = 1423423382. Its totient is φ = 1423423380.

The previous prime is 1423423301. The next prime is 1423423427. The reversal of 1423423381 is 1833243241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1410678481 + 12744900 = 37559^2 + 3570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423423381 is a prime.

It is a super-2 number, since 2×1423423381² = 4052268243154942322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423423301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711711690 + 711711691.

It is an arithmetic number, because the mean of its divisors is an integer number (711711691).

Almost surely, 2^1423423381 is an apocalyptic number.

It is an amenable number.

1423423381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423423381 is an equidigital number, since it uses as much as digits as its factorization.

1423423381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 1423423381 is about 37728.2835681667. The cubic root of 1423423381 is about 1124.8933906548.

The spelling of 1423423381 in words is "one billion, four hundred twenty-three million, four hundred twenty-three thousand, three hundred eighty-one".