162956021 has 2 divisors, whose sum is σ = 162956022. Its totient is φ = 162956020.

The previous prime is 162956011. The next prime is 162956041. The reversal of 162956021 is 120659261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83923921 + 79032100 = 9161^2 + 8890^2 .

It is a cyclic number.

It is not a de Polignac number, because 162956021 - 2⁶ = 162955957 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_9130829 and since 162956021 and 9130829 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162956011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81478010 + 81478011.

It is an arithmetic number, because the mean of its divisors is an integer number (81478011).

Almost surely, 2^162956021 is an apocalyptic number.

It is an amenable number.

162956021 is a deficient number, since it is larger than the sum of its proper divisors (1).

162956021 is an equidigital number, since it uses as much as digits as its factorization.

162956021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 162956021 is about 12765.4228680448. The cubic root of 162956021 is about 546.2064243386.

The spelling of 162956021 in words is "one hundred sixty-two million, nine hundred fifty-six thousand, twenty-one".