162721043 has 2 divisors, whose sum is σ = 162721044. Its totient is φ = 162721042.

The previous prime is 162721019. The next prime is 162721061. The reversal of 162721043 is 340127261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162721043 - 2¹² = 162716947 is a prime.

It is not a weakly prime, because it can be changed into another prime (162721063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81360521 + 81360522.

It is an arithmetic number, because the mean of its divisors is an integer number (81360522).

Almost surely, 2^162721043 is an apocalyptic number.

162721043 is a deficient number, since it is larger than the sum of its proper divisors (1).

162721043 is an equidigital number, since it uses as much as digits as its factorization.

162721043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 162721043 is about 12756.2158573771. The cubic root of 162721043 is about 545.9437599450.

The spelling of 162721043 in words is "one hundred sixty-two million, seven hundred twenty-one thousand, forty-three".