162649381 has 2 divisors, whose sum is σ = 162649382. Its totient is φ = 162649380.

The previous prime is 162649351. The next prime is 162649393. The reversal of 162649381 is 183946261.

162649381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103205281 + 59444100 = 10159^2 + 7710^2 .

It is a cyclic number.

It is not a de Polignac number, because 162649381 - 2¹⁷ = 162518309 is a prime.

It is a super-2 number, since 2×162649381² = 52909642279366322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162649351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81324690 + 81324691.

It is an arithmetic number, because the mean of its divisors is an integer number (81324691).

Almost surely, 2^162649381 is an apocalyptic number.

It is an amenable number.

162649381 is a deficient number, since it is larger than the sum of its proper divisors (1).

162649381 is an equidigital number, since it uses as much as digits as its factorization.

162649381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 162649381 is about 12753.4066429327. The cubic root of 162649381 is about 545.8636040215.

The spelling of 162649381 in words is "one hundred sixty-two million, six hundred forty-nine thousand, three hundred eighty-one".