1814467381 has 2 divisors, whose sum is σ = 1814467382. Its totient is φ = 1814467380.

The previous prime is 1814467379. The next prime is 1814467397. The reversal of 1814467381 is 1837644181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1325615281 + 488852100 = 36409^2 + 22110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1814467381 - 2¹ = 1814467379 is a prime.

It is a super-2 number, since 2×1814467381² = 6584583753425998322, which contains 22 as substring.

Together with 1814467379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1814467351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907233690 + 907233691.

It is an arithmetic number, because the mean of its divisors is an integer number (907233691).

Almost surely, 2^1814467381 is an apocalyptic number.

It is an amenable number.

1814467381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1814467381 is an equidigital number, since it uses as much as digits as its factorization.

1814467381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 1814467381 is about 42596.5653662358. The cubic root of 1814467381 is about 1219.6907262720.

The spelling of 1814467381 in words is "one billion, eight hundred fourteen million, four hundred sixty-seven thousand, three hundred eighty-one".