1395622381 has 2 divisors, whose sum is σ = 1395622382. Its totient is φ = 1395622380.

The previous prime is 1395622337. The next prime is 1395622441. The reversal of 1395622381 is 1832265931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329769156 + 65853225 = 36466^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395622381 - 2⁹ = 1395621869 is a prime.

It is a super-2 number, since 2×1395622381² = 3895523660696218322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395625381) 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, 697811190 + 697811191.

It is an arithmetic number, because the mean of its divisors is an integer number (697811191).

Almost surely, 2^1395622381 is an apocalyptic number.

It is an amenable number.

1395622381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395622381 is an equidigital number, since it uses as much as digits as its factorization.

1395622381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 1395622381 is about 37358.0296723476. The cubic root of 1395622381 is about 1117.5217260931.

The spelling of 1395622381 in words is "one billion, three hundred ninety-five million, six hundred twenty-two thousand, three hundred eighty-one".