1493333381 has 2 divisors, whose sum is σ = 1493333382. Its totient is φ = 1493333380.

The previous prime is 1493333327. The next prime is 1493333383. The reversal of 1493333381 is 1833333941.

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., 1394649025 + 98684356 = 37345^2 + 9934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1493333381 - 2¹⁴ = 1493316997 is a prime.

It is a super-2 number, since 2×1493333381² = 4460089173617782322, which contains 22 as substring.

Together with 1493333383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1493333383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746666690 + 746666691.

It is an arithmetic number, because the mean of its divisors is an integer number (746666691).

Almost surely, 2^1493333381 is an apocalyptic number.

It is an amenable number.

1493333381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493333381 is an equidigital number, since it uses as much as digits as its factorization.

1493333381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 1493333381 is about 38643.6719399179. The cubic root of 1493333381 is about 1143.0158631367.

The spelling of 1493333381 in words is "one billion, four hundred ninety-three million, three hundred thirty-three thousand, three hundred eighty-one".