162629561 has 2 divisors, whose sum is σ = 162629562. Its totient is φ = 162629560.

The previous prime is 162629543. The next prime is 162629563. The reversal of 162629561 is 165926261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 74926336 = 9365^2 + 8656^2 .

It is an emirp because it is prime and its reverse (165926261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162629561 - 2²⁶ = 95520697 is a prime.

It is a super-2 number, since 2×162629561² = 52896748222105442, which contains 22 as substring.

Together with 162629563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162629563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81314780 + 81314781.

It is an arithmetic number, because the mean of its divisors is an integer number (81314781).

Almost surely, 2^162629561 is an apocalyptic number.

It is an amenable number.

162629561 is a deficient number, since it is larger than the sum of its proper divisors (1).

162629561 is an equidigital number, since it uses as much as digits as its factorization.

162629561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 162629561 is about 12752.6295719746. The cubic root of 162629561 is about 545.8414306486.

The spelling of 162629561 in words is "one hundred sixty-two million, six hundred twenty-nine thousand, five hundred sixty-one".