162841621 has 2 divisors, whose sum is σ = 162841622. Its totient is φ = 162841620.

The previous prime is 162841597. The next prime is 162841639. The reversal of 162841621 is 126148261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88623396 + 74218225 = 9414^2 + 8615^2 .

It is a cyclic number.

It is not a de Polignac number, because 162841621 - 2¹⁷ = 162710549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162841681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81420810 + 81420811.

It is an arithmetic number, because the mean of its divisors is an integer number (81420811).

Almost surely, 2^162841621 is an apocalyptic number.

It is an amenable number.

162841621 is a deficient number, since it is larger than the sum of its proper divisors (1).

162841621 is an equidigital number, since it uses as much as digits as its factorization.

162841621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 162841621 is about 12760.9412270412. The cubic root of 162841621 is about 546.0785766682.

Adding to 162841621 its reverse (126148261), we get a palindrome (288989882).

The spelling of 162841621 in words is "one hundred sixty-two million, eight hundred forty-one thousand, six hundred twenty-one".