162621449 has 2 divisors, whose sum is σ = 162621450. Its totient is φ = 162621448.

The previous prime is 162621419. The next prime is 162621451. The reversal of 162621449 is 944126261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128981449 + 33640000 = 11357^2 + 5800^2 .

It is a cyclic number.

It is not a de Polignac number, because 162621449 - 2¹² = 162617353 is a prime.

Together with 162621451, 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 (162621419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81310724 + 81310725.

It is an arithmetic number, because the mean of its divisors is an integer number (81310725).

Almost surely, 2^162621449 is an apocalyptic number.

It is an amenable number.

162621449 is a deficient number, since it is larger than the sum of its proper divisors (1).

162621449 is an equidigital number, since it uses as much as digits as its factorization.

162621449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 162621449 is about 12752.3115159566. The cubic root of 162621449 is about 545.8323549322.

The spelling of 162621449 in words is "one hundred sixty-two million, six hundred twenty-one thousand, four hundred forty-nine".