162388381 has 2 divisors, whose sum is σ = 162388382. Its totient is φ = 162388380.

The previous prime is 162388367. The next prime is 162388393. The reversal of 162388381 is 183883261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 9865881 = 12350^2 + 3141^2 .

It is a cyclic number.

It is not a de Polignac number, because 162388381 - 2¹³ = 162380189 is a prime.

It is a super-2 number, since 2×162388381² = 52739972567602322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162388321) 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, 81194190 + 81194191.

It is an arithmetic number, because the mean of its divisors is an integer number (81194191).

Almost surely, 2^162388381 is an apocalyptic number.

It is an amenable number.

162388381 is a deficient number, since it is larger than the sum of its proper divisors (1).

162388381 is an equidigital number, since it uses as much as digits as its factorization.

162388381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 162388381 is about 12743.1699745393. The cubic root of 162388381 is about 545.5714691356.

The spelling of 162388381 in words is "one hundred sixty-two million, three hundred eighty-eight thousand, three hundred eighty-one".