1348366381 has 4 divisors (see below), whose sum is σ = 1349203932. Its totient is φ = 1347528832.

The previous prime is 1348366379. The next prime is 1348366451. The reversal of 1348366381 is 1836638431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1836638431 = 31 ⋅59246401.

It can be written as a sum of positive squares in 2 ways, for example, as 265364100 + 1083002281 = 16290^2 + 32909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1348366381 - 2¹ = 1348366379 is a prime.

It is a super-2 number, since 2×1348366381² = 3636183794822074322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1348366301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416356 + ... + 419581.

It is an arithmetic number, because the mean of its divisors is an integer number (337300983).

Almost surely, 2^1348366381 is an apocalyptic number.

It is an amenable number.

1348366381 is a deficient number, since it is larger than the sum of its proper divisors (837551).

1348366381 is an equidigital number, since it uses as much as digits as its factorization.

1348366381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837550.

The product of its digits is 248832, while the sum is 43.

The square root of 1348366381 is about 36720.1086735865. The cubic root of 1348366381 is about 1104.7634693665.

The spelling of 1348366381 in words is "one billion, three hundred forty-eight million, three hundred sixty-six thousand, three hundred eighty-one".